aboutsummaryrefslogtreecommitdiff
path: root/timezone/northamerica
blob: 3184b7bdff573ca634d254c96712f97b6a8980ea (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
# @(#)northamerica	8.15
# <pre>

# also includes Central America and the Caribbean

# This data is by no means authoritative; if you think you know better,
# go ahead and edit the file (and please send any changes to
# tz@elsie.nci.nih.gov for general use in the future).

# From Paul Eggert (1999-03-22):
# A reliable and entertaining source about time zones is
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997).

###############################################################################

# United States

# From Paul Eggert (1999-03-31):
# Howse writes (pp 121-125) that time zones were invented by
# Professor Charles Ferdinand Dowd (1825-1904),
# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY).
# His pamphlet ``A System of National Time for Railroads'' (1870)
# was the result of his proposals at the Convention of Railroad Trunk Lines
# in New York City (1869-10).  His 1870 proposal was based on Washington, DC,
# but in 1872-05 he moved the proposed origin to Greenwich.
# His proposal was adopted by the railroads on 1883-11-18 at 12:00,
# and the most of the country soon followed suit.

# From Paul Eggert (2005-04-16):
# That 1883 transition occurred at 12:00 new time, not at 12:00 old time.
# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005).

# From Paul Eggert (2006-03-22):
# A good source for time zone historical data in the US is
# Thomas G. Shanks, The American Atlas (5th edition),
# San Diego: ACS Publications, Inc. (1991).
# Make sure you have the errata sheet; the book is somewhat useless without it.
# It is the source for most of the pre-1991 US entries below.

# From Paul Eggert (2001-03-06):
# Daylight Saving Time was first suggested as a joke by Benjamin Franklin
# in his whimsical essay ``An Economical Project for Diminishing the Cost
# of Light'' published in the Journal de Paris (1784-04-26).
# Not everyone is happy with the results:
#
#	I don't really care how time is reckoned so long as there is some
#	agreement about it, but I object to being told that I am saving
#	daylight when my reason tells me that I am doing nothing of the kind.
#	I even object to the implication that I am wasting something
#	valuable if I stay in bed after the sun has risen.  As an admirer
#	of moonlight I resent the bossy insistence of those who want to
#	reduce my time for enjoying it.  At the back of the Daylight Saving
#	scheme I detect the bony, blue-fingered hand of Puritanism, eager
#	to push people into bed earlier, and get them up earlier, to make
#	them healthy, wealthy and wise in spite of themselves.
#
#	-- Robertson Davies, The diary of Samuel Marchbanks,
#	   Clarke, Irwin (1947), XIX, Sunday
#
# For more about the first ten years of DST in the United States, see
# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html">
# Ten years of daylight saving from the Pittsburgh standpoint
# (Carnegie Library of Pittsburgh, 1927)</a>.
#
# Shanks says that DST was called "War Time" in the US in 1918 and 1919.
# However, DST was imposed by the Standard Time Act of 1918, which
# was the first nationwide legal time standard, and apparently
# time was just called "Standard Time" or "Daylight Saving Time".

# From Arthur David Olson:
# US Daylight Saving Time ended on the last Sunday of *October* in 1974.
# See, for example, the front page of the Saturday, 1974-10-26
# and Sunday, 1974-10-27 editions of the Washington Post.

# From Arthur David Olson:
# Before the Uniform Time Act of 1966 took effect in 1967, observance of
# Daylight Saving Time in the US was by local option, except during wartime.

# From Arthur David Olson (2000-09-25):
# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama.
# In the introduction, Oboler spoke of "Eastern Peace Time."
# An AltaVista search turned up
# <a href="http://rowayton.org/rhs/hstaug45.html">:
# "When the time is announced over the radio now, it is 'Eastern Peace
# Time' instead of the old familiar 'Eastern War Time.'  Peace is wonderful."
# </a> (August 1945) by way of confirmation.

# From Joseph Gallant citing
# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987):
# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set
# to switch to London for Attlee's address, but the American people
# never got to hear his speech live. According to one press account,
# CBS' Bob Trout was first to announce the word of Japan's surrender,
# but a few seconds later, NBC, ABC and Mutual also flashed the word
# of surrender, all of whom interrupting the bells of Big Ben in
# London which were to precede Mr. Attlee's speech.

# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout.  From
# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times:
#
# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender.
# Any announcement from Asia would reach St. John's New York newsroom on a
# wire service teletype machine, which had prescribed signals for major news.
# Associated Press, for example, would ring five bells before spewing out
# typed copy of an important story, and 10 bells for news "of transcendental
# importance."
#
# On Aug. 14, stalling while talking steadily into the NBC networks' open
# microphone, St. John heard five bells and waited only to hear a sixth bell,
# before announcing confidently: "Ladies and gentlemen, World War II is over.
# The Japanese have agreed to our surrender terms."
#
# He had scored a 20-second scoop on other broadcasters.

# From Arthur David Olson (2005-08-22):
# Paul has been careful to use the "US" rules only in those locations
# that are part of the United States; this reflects the real scope of
# U.S. government action.  So even though the "US" rules have changed
# in the latest release, other countries won't be affected.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	US	1918	1919	-	Mar	lastSun	2:00	1:00	D
Rule	US	1918	1919	-	Oct	lastSun	2:00	0	S
Rule	US	1942	only	-	Feb	9	2:00	1:00	W # War
Rule	US	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	US	1945	only	-	Sep	30	2:00	0	S
Rule	US	1967	2006	-	Oct	lastSun	2:00	0	S
Rule	US	1967	1973	-	Apr	lastSun	2:00	1:00	D
Rule	US	1974	only	-	Jan	6	2:00	1:00	D
Rule	US	1975	only	-	Feb	23	2:00	1:00	D
Rule	US	1976	1986	-	Apr	lastSun	2:00	1:00	D
Rule	US	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
Rule	US	2007	max	-	Mar	Sun>=8	2:00	1:00	D
Rule	US	2007	max	-	Nov	Sun>=1	2:00	0	S

# From Arthur David Olson, 2005-12-19
# We generate the files specified below to guard against old files with
# obsolete information being left in the time zone binary directory.
# We limit the list to names that have appeared in previous versions of
# this time zone package.
# We do these as separate Zones rather than as Links to avoid problems if
# a particular place changes whether it observes DST.
# We put these specifications here in the northamerica file both to
# increase the chances that they'll actually get compiled and to
# avoid the need to duplicate the US rules in another file.

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	EST		 -5:00	-	EST
Zone	MST		 -7:00	-	MST
Zone	HST		-10:00	-	HST
Zone	EST5EDT		 -5:00	US	E%sT
Zone	CST6CDT		 -6:00	US	C%sT
Zone	MST7MDT		 -7:00	US	M%sT
Zone	PST8PDT		 -8:00	US	P%sT

# From Bob Devine (1988-01-28):
# ...Alaska (and Hawaii) had the timezone names changed in 1967.
#    old			 new
#    Pacific Standard Time(PST)  -same-
#    Yukon Standard Time(YST)    -same-
#    Central Alaska S.T. (CAT)   Alaska-Hawaii St[an]dard Time (AHST)
#    Nome Standard Time (NT)     Bering Standard Time (BST)
#
# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz.
#    The YST zone now covers nearly all of the state, AHST just part
#    of the Aleutian islands.   No DST.

# From Paul Eggert (1995-12-19):
# The tables below use `NST', not `NT', for Nome Standard Time.
# I invented `CAWT' for Central Alaska War Time.

# From U. S. Naval Observatory (1989-01-19):
# USA  EASTERN       5 H  BEHIND UTC    NEW YORK, WASHINGTON
# USA  EASTERN       4 H  BEHIND UTC    APR 3 - OCT 30
# USA  CENTRAL       6 H  BEHIND UTC    CHICAGO, HOUSTON
# USA  CENTRAL       5 H  BEHIND UTC    APR 3 - OCT 30
# USA  MOUNTAIN      7 H  BEHIND UTC    DENVER
# USA  MOUNTAIN      6 H  BEHIND UTC    APR 3 - OCT 30
# USA  PACIFIC       8 H  BEHIND UTC    L.A., SAN FRANCISCO
# USA  PACIFIC       7 H  BEHIND UTC    APR 3 - OCT 30
# USA  ALASKA STD    9 H  BEHIND UTC    MOST OF ALASKA     (AKST)
# USA  ALASKA STD    8 H  BEHIND UTC    APR 3 - OCT 30 (AKDT)
# USA  ALEUTIAN     10 H  BEHIND UTC    ISLANDS WEST OF 170W
# USA  - " -         9 H  BEHIND UTC    APR 3 - OCT 30
# USA  HAWAII       10 H  BEHIND UTC
# USA  BERING       11 H  BEHIND UTC    SAMOA, MIDWAY

# From Arthur David Olson (1989-01-21):
# The above dates are for 1988.
# Note the "AKST" and "AKDT" abbreviations, the claim that there's
# no DST in Samoa, and the claim that there is DST in Alaska and the
# Aleutians.

# From Arthur David Olson (1988-02-13):
# Legal standard time zone names, from United States Code (1982 Edition and
# Supplement III), Title 15, Chapter 6, Section 260 and forward.  First, names
# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966
# took effect), as explained in sections 263 and 261:
#	(none)
#	United States standard eastern time
#	United States standard mountain time
#	United States standard central time
#	United States standard Pacific time
#	(none)
#	United States standard Alaska time
#	(none)
# Next, names from 1967-04-01 until 1983-11-30 (the date for
# public law 98-181):
#	Atlantic standard time
#	eastern standard time
#	central standard time
#	mountain standard time
#	Pacific standard time
#	Yukon standard time
#	Alaska-Hawaii standard time
#	Bering standard time
# And after 1983-11-30:
#	Atlantic standard time
#	eastern standard time
#	central standard time
#	mountain standard time
#	Pacific standard time
#	Alaska standard time
#	Hawaii-Aleutian standard time
#	Samoa standard time
# The law doesn't give abbreviations.
#
# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow:
# Public law 106-564 (2000-12-23) introduced the abbreviation
# "Chamorro Standard Time" for time in Guam and the Northern Marianas.
# See the file "australasia".

# From Arthur David Olson, 2005-08-09
# The following was signed into law on 2005-08-08.
#
# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS.
#   (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15
#   U.S.C. 260a(a)) is amended--
#     (1) by striking `first Sunday of April' and inserting `second
#     Sunday of March'; and
#     (2) by striking `last Sunday of October' and inserting `first
#     Sunday of November'.
#   (b) Effective Date- Subsection (a) shall take effect 1 year after the
#   date of enactment of this Act or March 1, 2007, whichever is later.
#   (c) Report to Congress- Not later than 9 months after the effective
#   date stated in subsection (b), the Secretary shall report to Congress
#   on the impact of this section on energy consumption in the United
#   States.
#   (d) Right to Revert- Congress retains the right to revert the
#   Daylight Saving Time back to the 2005 time schedules once the
#   Department study is complete.

# US eastern time, represented by New York

# Connecticut, Delaware, District of Columbia, most of Florida,
# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky
# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts,
# New Hampshire, New Jersey, New York, North Carolina, Ohio,
# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee,
# Vermont, Virginia, West Virginia

# From Dave Cantor (2004-11-02):
# Early this summer I had the occasion to visit the Mount Washington
# Observatory weather station atop (of course!) Mount Washington [, NH]....
# One of the staff members said that the station was on Eastern Standard Time
# and didn't change their clocks for Daylight Saving ... so that their
# reports will always have times which are 5 hours behind UTC.

# From Paul Eggert (2005-08-26):
# According to today's Huntsville Times
# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1>
# a few towns on Alabama's "eastern border with Georgia, such as Phenix City
# in Russell County, Lanett in Chambers County and some towns in Lee County,
# set their watches and clocks on Eastern time."  It quotes H.H. "Bubba"
# Roberts, city administrator in Phenix City. as saying "We are in the Central
# time zone, but we do go by the Eastern time zone because so many people work
# in Columbus."

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	NYC	1920	only	-	Mar	lastSun	2:00	1:00	D
Rule	NYC	1920	only	-	Oct	lastSun	2:00	0	S
Rule	NYC	1921	1966	-	Apr	lastSun	2:00	1:00	D
Rule	NYC	1921	1954	-	Sep	lastSun	2:00	0	S
Rule	NYC	1955	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/New_York	-4:56:02 -	LMT	1883 Nov 18 12:03:58
			-5:00	US	E%sT	1920
			-5:00	NYC	E%sT	1942
			-5:00	US	E%sT	1946
			-5:00	NYC	E%sT	1967
			-5:00	US	E%sT

# US central time, represented by Chicago

# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia,
# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and
# Washington counties), Illinois, western Indiana
# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western
# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern
# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota,
# western Tennessee, most of Texas, Wisconsin

# From Larry M. Smith (2006-04-26) re Wisconsin:
# http://www.legis.state.wi.us/statutes/Stat0175.pdf ...
# is currently enforced at the 01:00 time of change.  Because the local
# "bar time" in the state corresponds to 02:00, a number of citations
# are issued for the "sale of class 'B' alcohol after prohibited
# hours" within the deviated hour of this change every year....
#
# From Douglas R. Bomberg (2007-03-12):
# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI
# Statue 175 closer in synch with the US Congress' intent....
# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	Chicago	1920	only	-	Jun	13	2:00	1:00	D
Rule	Chicago	1920	1921	-	Oct	lastSun	2:00	0	S
Rule	Chicago	1921	only	-	Mar	lastSun	2:00	1:00	D
Rule	Chicago	1922	1966	-	Apr	lastSun	2:00	1:00	D
Rule	Chicago	1922	1954	-	Sep	lastSun	2:00	0	S
Rule	Chicago	1955	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Chicago	-5:50:36 -	LMT	1883 Nov 18 12:09:24
			-6:00	US	C%sT	1920
			-6:00	Chicago	C%sT	1936 Mar  1 2:00
			-5:00	-	EST	1936 Nov 15 2:00
			-6:00	Chicago	C%sT	1942
			-6:00	US	C%sT	1946
			-6:00	Chicago	C%sT	1967
			-6:00	US	C%sT
# Oliver County, ND switched from mountain to central time on 1992-10-25.
Zone America/North_Dakota/Center -6:45:12 - LMT	1883 Nov 18 12:14:48
			-7:00	US	M%sT	1992 Oct 25 02:00
			-6:00	US	C%sT
# Morton County, ND, switched from mountain to central time on
# 2003-10-26, except for the area around Mandan which was already central time.
# See <http://dmses.dot.gov/docimages/p63/135818.pdf>.
# Officially this switch also included part of Sioux County, and
# Jones, Mellette, and Todd Counties in South Dakota;
# but in practice these other counties were already observing central time.
# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>.
Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21
			-7:00	US	M%sT	2003 Oct 26 02:00
			-6:00	US	C%sT

# US mountain time, represented by Denver
#
# Colorado, far western Kansas, Montana, western
# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City),
# New Mexico, southwestern North Dakota, far eastern Oregon,
# western South Dakota, far western Texas (El Paso County, Hudspeth County,
# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming
#
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	Denver	1920	1921	-	Mar	lastSun	2:00	1:00	D
Rule	Denver	1920	only	-	Oct	lastSun	2:00	0	S
Rule	Denver	1921	only	-	May	22	2:00	0	S
Rule	Denver	1965	1966	-	Apr	lastSun	2:00	1:00	D
Rule	Denver	1965	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Denver	-6:59:56 -	LMT	1883 Nov 18 12:00:04
			-7:00	US	M%sT	1920
			-7:00	Denver	M%sT	1942
			-7:00	US	M%sT	1946
			-7:00	Denver	M%sT	1967
			-7:00	US	M%sT

# US Pacific time, represented by Los Angeles
#
# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater,
# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties),
# most of Nevada, most of Oregon, and Washington
#
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	CA	1948	only	-	Mar	14	2:00	1:00	D
Rule	CA	1949	only	-	Jan	 1	2:00	0	S
Rule	CA	1950	1966	-	Apr	lastSun	2:00	1:00	D
Rule	CA	1950	1961	-	Sep	lastSun	2:00	0	S
Rule	CA	1962	1966	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Los_Angeles -7:52:58 -	LMT	1883 Nov 18 12:07:02
			-8:00	US	P%sT	1946
			-8:00	CA	P%sT	1967
			-8:00	US	P%sT

# Alaska
# AK%sT is the modern abbreviation for -9:00 per USNO.
#
# From Paul Eggert (2001-05-30):
# Howse writes that Alaska switched from the Julian to the Gregorian calendar,
# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia.
# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian,
# also a Friday.  Include only the time zone part of this transition,
# ignoring the switch from Julian to Gregorian, since we can't represent
# the Julian calendar.
#
# As far as we know, none of the exact locations mentioned below were
# permanently inhabited in 1867 by anyone using either calendar.
# (Yakutat was colonized by the Russians in 1799, but the settlement
# was destroyed in 1805 by a Yakutat-kon war party.)  However, there
# were nearby inhabitants in some cases and for our purposes perhaps
# it's best to simply use the official transition.
#
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Juneau	 15:02:19 -	LMT	1867 Oct 18
			 -8:57:41 -	LMT	1900 Aug 20 12:00
			 -8:00	-	PST	1942
			 -8:00	US	P%sT	1946
			 -8:00	-	PST	1969
			 -8:00	US	P%sT	1983 Oct 30 2:00
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Yakutat	 14:41:05 -	LMT	1867 Oct 18
			 -9:18:55 -	LMT	1900 Aug 20 12:00
			 -9:00	-	YST	1942
			 -9:00	US	Y%sT	1946
			 -9:00	-	YST	1969
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Anchorage	 14:00:24 -	LMT	1867 Oct 18
			 -9:59:36 -	LMT	1900 Aug 20 12:00
			-10:00	-	CAT	1942
			-10:00	US	CAT/CAWT 1945 Aug 14 23:00u
			-10:00	US	CAT/CAPT 1946 # Peace
			-10:00	-	CAT	1967 Apr
			-10:00	-	AHST	1969
			-10:00	US	AH%sT	1983 Oct 30 2:00
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Nome	 12:58:21 -	LMT	1867 Oct 18
			-11:01:38 -	LMT	1900 Aug 20 12:00
			-11:00	-	NST	1942
			-11:00	US	N%sT	1946
			-11:00	-	NST	1967 Apr
			-11:00	-	BST	1969
			-11:00	US	B%sT	1983 Oct 30 2:00
			 -9:00	US	Y%sT	1983 Nov 30
			 -9:00	US	AK%sT
Zone America/Adak	 12:13:21 -	LMT	1867 Oct 18
			-11:46:38 -	LMT	1900 Aug 20 12:00
			-11:00	-	NST	1942
			-11:00	US	N%sT	1946
			-11:00	-	NST	1967 Apr
			-11:00	-	BST	1969
			-11:00	US	B%sT	1983 Oct 30 2:00
			-10:00	US	AH%sT	1983 Nov 30
			-10:00	US	HA%sT
# The following switches don't quite make our 1970 cutoff.
#
# Shanks writes that part of southwest Alaska (e.g. Aniak)
# switched from -11:00 to -10:00 on 1968-09-22 at 02:00,
# and another part (e.g. Akiak) made the same switch five weeks later.
#
# From David Flater (2004-11-09):
# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska
# Historic Preservation Commission, provided this information, which
# suggests that Unalaska deviated from statutory time from early 1967
# possibly until 1983:
#
#  Minutes of the Unalaska City Council Meeting, January 10, 1967:
#  "Except for St. Paul and Akutan, Unalaska is the only important
#  location not on Alaska Standard Time.  The following resolution was
#  made by William Robinson and seconded by Henry Swanson:  Be it
#  resolved that the City of Unalaska hereby goes to Alaska Standard
#  Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday,
#  January 14, Alaska Standard Time.)  This resolution was passed with
#  three votes for and one against."

# Hawaii
#
# From Arthur David Olson:
# And then there's Hawaii.
# DST was observed for one day in 1933;
# standard time was changed by half an hour in 1947;
# it's always standard as of 1986.
#
# From Paul Eggert:
# Shanks says the 1933 experiment lasted for three weeks.  Go with Shanks.
#
Zone Pacific/Honolulu	-10:31:26 -	LMT	1900 Jan  1 12:00
			-10:30	-	HST	1933 Apr 30 2:00
			-10:30	1:00	HDT	1933 May 21 2:00
			-10:30	US	H%sT	1947 Jun  8 2:00
			-10:00	-	HST

# Now we turn to US areas that have diverged from the consensus since 1970.

# Arizona mostly uses MST.

# From Paul Eggert (2002-10-20):
#
# The information in the rest of this paragraph is derived from the
# <a href="http://www.dlapr.lib.az.us/links/daylight.htm">
# Daylight Saving Time web page (2002-01-23)</a> maintained by the
# Arizona State Library, Archives and Public Records.
# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard
# time, but by federal law railroads, airlines, bus lines, military
# personnel, and some engaged in interstate commerce continued to
# observe war (i.e., daylight saving) time.  The 1944-03-17 Phoenix
# Gazette says that was the date the law changed, and that 04-01 was
# the date the state's clocks would change.  In 1945 the State of
# Arizona used standard time all year, again with exceptions only as
# mandated by federal law.  Arizona observed DST in 1967, but Arizona
# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST.
#
# Shanks says the 1944 experiment came to an end on 1944-03-17.
# Go with the Arizona State Library instead.

Zone America/Phoenix	-7:28:18 -	LMT	1883 Nov 18 11:31:42
			-7:00	US	M%sT	1944 Jan  1 00:01
			-7:00	-	MST	1944 Apr  1 00:01
			-7:00	US	M%sT	1944 Oct  1 00:01
			-7:00	-	MST	1967
			-7:00	US	M%sT	1968 Mar 21
			-7:00	-	MST
# From Arthur David Olson (1988-02-13):
# A writer from the Inter Tribal Council of Arizona, Inc.,
# notes in private correspondence dated 1987-12-28 that "Presently, only the
# Navajo Nation participates in the Daylight Saving Time policy, due to its
# large size and location in three states."  (The "only" means that other
# tribal nations don't use DST.)

Link America/Denver America/Shiprock

# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine,
# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark,
# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome,
# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power,
# Teton, Twin Falls, Valley, Washington counties) and eastern Oregon
# switched four weeks late in 1974.
#
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Boise	-7:44:49 -	LMT	1883 Nov 18 12:15:11
			-8:00	US	P%sT	1923 May 13 2:00
			-7:00	US	M%sT	1974
			-7:00	-	MST	1974 Feb  3 2:00
			-7:00	US	M%sT

# Indiana
#
# For a map of Indiana's time zone regions, see:
# <a href="http://www.mccsc.edu/time.html">
# What time is it in Indiana?
# </a> (2006-03-01)
#
# From Paul Eggert (2006-03-22):
# Since 1970, most of Indiana has been like America/Indiana/Indianapolis,
# with the following exceptions:
#
# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer,
#   Vandenburgh, and Warrick counties have been like America/Chicago.
#
# - Dearborn and Ohio counties have been like America/New_York.
#
# - Clark, Floyd, and Harrison counties have been like
#   America/Kentucky/Louisville.
#
# - Daviess, Dubois, Knox, Martin, Perry, and Pulaski counties
#   have been like America/Indiana/Vincennes.
#
# - Crawford, Pike, Starke, and Switzerland counties have their own time zone
#   histories as noted below.
#
# Shanks partitioned Indiana into 345 regions, each with its own time history,
# and wrote ``Even newspaper reports present contradictory information.''
# Those Hoosiers!  Such a flighty and changeable people!
# Fortunately, most of the complexity occurred before our cutoff date of 1970.
#
# Other than Indianapolis, the Indiana place names are so nondescript
# that they would be ambiguous if we left them at the `America' level.
# So we reluctantly put them all in a subdirectory `America/Indiana'.

# From Paul Eggert (2005-08-16):
# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006.

# From Nathan Stratton Treadway (2006-03-30):
# http://www.dot.gov/affairs/dot0406.htm [3705 B]
# From Deborah Goldsmith (2006-01-18):
# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB]
# From Paul Eggert (2006-01-20):
# It says "DOT is relocating the time zone boundary in Indiana to move Starke,
# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the
# Eastern Time Zone to the Central Time Zone.... The effective date of
# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the
# changeover date from standard time to Daylight Saving Time."
# Strictly speaking, this means the affected counties will change their
# clocks twice that night, but this obviously is in error.  The intent
# is that 01:59:59 EST be followed by 02:00:00 CDT.

# From Gwillim Law (2007-02-10):
# The Associated Press has been reporting that Pulaski County, Indiana is
# going to switch from Central to Eastern Time on March 11, 2007....
# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule Indianapolis 1941	only	-	Jun	22	2:00	1:00	D
Rule Indianapolis 1941	1954	-	Sep	lastSun	2:00	0	S
Rule Indianapolis 1946	1954	-	Apr	lastSun	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22
			-6:00	US	C%sT	1920
			-6:00 Indianapolis C%sT	1942
			-6:00	US	C%sT	1946
			-6:00 Indianapolis C%sT	1955 Apr 24 2:00
			-5:00	-	EST	1957 Sep 29 2:00
			-6:00	-	CST	1958 Apr 27 2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1971
			-5:00	-	EST	2006
			-5:00	US	E%sT
#
# Eastern Crawford County, Indiana, left its clocks alone in 1974,
# as well as from 1976 through 2005.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	Marengo	1951	only	-	Apr	lastSun	2:00	1:00	D
Rule	Marengo	1951	only	-	Sep	lastSun	2:00	0	S
Rule	Marengo	1954	1960	-	Apr	lastSun	2:00	1:00	D
Rule	Marengo	1954	1960	-	Sep	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Marengo -5:45:23 -	LMT	1883 Nov 18 12:14:37
			-6:00	US	C%sT	1951
			-6:00	Marengo	C%sT	1961 Apr 30 2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1974 Jan  6 2:00
			-6:00	1:00	CDT	1974 Oct 27 2:00
			-5:00	US	E%sT	1976
			-5:00	-	EST	2006
			-5:00	US	E%sT
#
# Daviess, Dubois, Knox, Martin, and Perry Counties, Indiana,
# switched from eastern to central time in April 2006.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule Vincennes	1946	only	-	Apr	lastSun	2:00	1:00	D
Rule Vincennes	1946	only	-	Sep	lastSun	2:00	0	S
Rule Vincennes	1953	1954	-	Apr	lastSun	2:00	1:00	D
Rule Vincennes	1953	1959	-	Sep	lastSun	2:00	0	S
Rule Vincennes	1955	only	-	May	 1	0:00	1:00	D
Rule Vincennes	1956	1963	-	Apr	lastSun	2:00	1:00	D
Rule Vincennes	1960	only	-	Oct	lastSun	2:00	0	S
Rule Vincennes	1961	only	-	Sep	lastSun	2:00	0	S
Rule Vincennes	1962	1963	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Vincennes -5:50:07 - LMT	1883 Nov 18 12:09:53
			-6:00	US	C%sT	1946
			-6:00 Vincennes	C%sT	1964 Apr 26 2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1971
			-5:00	-	EST	2006 Apr  2 2:00
			-6:00	US	C%sT
#
# Pike County, Indiana moved from central to eastern time in 1977,
# then switched back in 2006.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	Pike	1955	only	-	May	 1	0:00	1:00	D
Rule	Pike	1955	1960	-	Sep	lastSun	2:00	0	S
Rule	Pike	1956	1964	-	Apr	lastSun	2:00	1:00	D
Rule	Pike	1961	1964	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Petersburg -5:49:07 - LMT	1883 Nov 18 12:10:53
			-6:00	US	C%sT	1955
			-6:00	Pike	C%sT	1965 Apr 25 2:00
			-5:00	-	EST	1966 Oct 30 2:00
			-6:00	US	C%sT	1977 Oct 30 2:00
			-5:00	-	EST	2006 Apr  2 2:00
			-6:00	US	C%sT
#
# Starke County, Indiana moved from central to eastern time in 1991,
# then switched back in 2006.
# From Arthur David Olson (1991-10-28):
# An article on page A3 of the Sunday, 1991-10-27 Washington Post
# notes that Starke County switched from Central time to Eastern time as of
# 1991-10-27.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 12:13:30
			-6:00	US	C%sT	1947
			-6:00	Starke	C%sT	1962 Apr 29 2:00
			-5:00	-	EST	1963 Oct 27 2:00
			-6:00	US	C%sT	1991 Oct 27 2:00
			-5:00	-	EST	2006 Apr  2 2:00
			-6:00	US	C%sT
#
# Pulaski County, Indiana, switched from eastern to central time in
# April 2006 and then switched back in March 2007.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	Pulaski	1946	1960	-	Apr	lastSun	2:00	1:00	D
Rule	Pulaski	1946	1954	-	Sep	lastSun	2:00	0	S
Rule	Pulaski	1955	1956	-	Oct	lastSun	2:00	0	S
Rule	Pulaski	1957	1960	-	Sep	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Winamac -5:46:25 - LMT	1883 Nov 18 12:13:35
			-6:00	US	C%sT	1946
			-6:00	Pulaski	C%sT	1961 Apr 30 2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1971
			-5:00	-	EST	2006 Apr  2 2:00
			-6:00	US	C%sT	2007 Mar 11 2:00
			-5:00	US	E%sT
#
# Switzerland County, Indiana, did not observe DST from 1973 through 2005.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Vevay -5:40:16 -	LMT	1883 Nov 18 12:19:44
			-6:00	US	C%sT	1954 Apr 25 2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1973
			-5:00	-	EST	2006
			-5:00	US	E%sT

# Part of Kentucky left its clocks alone in 1974.
# This also includes Clark, Floyd, and Harrison counties in Indiana.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule Louisville	1921	only	-	May	1	2:00	1:00	D
Rule Louisville	1921	only	-	Sep	1	2:00	0	S
Rule Louisville	1941	1961	-	Apr	lastSun	2:00	1:00	D
Rule Louisville	1941	only	-	Sep	lastSun	2:00	0	S
Rule Louisville	1946	only	-	Jun	2	2:00	0	S
Rule Louisville	1950	1955	-	Sep	lastSun	2:00	0	S
Rule Louisville	1956	1960	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Kentucky/Louisville -5:43:02 -	LMT	1883 Nov 18 12:16:58
			-6:00	US	C%sT	1921
			-6:00 Louisville C%sT	1942
			-6:00	US	C%sT	1946
			-6:00 Louisville C%sT	1961 Jul 23 2:00
			-5:00	-	EST	1968
			-5:00	US	E%sT	1974 Jan  6 2:00
			-6:00	1:00	CDT	1974 Oct 27 2:00
			-5:00	US	E%sT
#
# Wayne County, Kentucky
#
# From
# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml">
# Lake Cumberland LIFE
# </a> (1999-01-29) via WKYM-101.7:
# Clinton County has joined Wayne County in asking the DoT to change from
# the Central to the Eastern time zone....  The Wayne County government made
# the same request in December.  And while Russell County officials have not
# taken action, the majority of respondents to a poll conducted there in
# August indicated they would like to change to "fast time" also.
# The three Lake Cumberland counties are the farthest east of any U.S.
# location in the Central time zone.
#
# From Rich Wales (2000-08-29):
# After prolonged debate, and despite continuing deep differences of opinion,
# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern
# (-0500) time.  They won't "fall back" this year.  See Sara Shipley,
# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400).
#
# From Paul Eggert (2001-07-16):
# The final rule was published in the
# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22">
# Federal Register 65, 160 (2000-08-17), page 50154-50158.
# </a>
#
Zone America/Kentucky/Monticello -5:39:24 - LMT	1883 Nov 18 12:20:36
			-6:00	US	C%sT	1946
			-6:00	-	CST	1968
			-6:00	US	C%sT	2000 Oct 29  2:00
			-5:00	US	E%sT


# From Rives McDow (2000-08-30):
# Here ... are all the changes in the US since 1985.
# Kearny County, KS (put all of county on central;
#	previously split between MST and CST) ... 1990-10
# Starke County, IN (from CST to EST) ... 1991-10
# Oliver County, ND (from MST to CST) ... 1992-10
# West Wendover, NV (from PST TO MST) ... 1999-10
# Wayne County, KY (from CST to EST) ... 2000-10
#
# From Paul Eggert (2001-07-17):
# We don't know where the line used to be within Kearny County, KS,
# so omit that change for now.
# See America/Indiana/Knox for the Starke County, IN change.
# See America/North_Dakota/Center for the Oliver County, ND change.
# West Wendover, NV officially switched from Pacific to mountain time on
# 1999-10-31.  See the
# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15">
# Federal Register 64, 203 (1999-10-21), page 56705-56707.
# </a>
# However, the Federal Register says that West Wendover already operated
# on mountain time, and the rule merely made this official;
# hence a separate tz entry is not needed.

# Michigan
#
# From Bob Devine (1988-01-28):
# Michigan didn't observe DST from 1968 to 1973.
#
# From Paul Eggert (1999-03-31):
# Shanks writes that Michigan started using standard time on 1885-09-18,
# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01)
# that Detroit kept
#
#	local time until 1900 when the City Council decreed that clocks should
#	be put back twenty-eight minutes to Central Standard Time.  Half the
#	city obeyed, half refused.  After considerable debate, the decision
#	was rescinded and the city reverted to Sun time.  A derisive offer to
#	erect a sundial in front of the city hall was referred to the
#	Committee on Sewers.  Then, in 1905, Central time was adopted
#	by city vote.
#
# This story is too entertaining to be false, so go with Howse over Shanks.
#
# From Paul Eggert (2001-03-06):
# Garland (1927) writes ``Cleveland and Detroit advanced their clocks
# one hour in 1914.''  This change is not in Shanks.  We have no more
# info, so omit this for now.
#
# Most of Michigan observed DST from 1973 on, but was a bit late in 1975.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	Detroit	1948	only	-	Apr	lastSun	2:00	1:00	D
Rule	Detroit	1948	only	-	Sep	lastSun	2:00	0	S
Rule	Detroit	1967	only	-	Jun	14	2:00	1:00	D
Rule	Detroit	1967	only	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Detroit	-5:32:11 -	LMT	1905
			-6:00	-	CST	1915 May 15 2:00
			-5:00	-	EST	1942
			-5:00	US	E%sT	1946
			-5:00	Detroit	E%sT	1973
			-5:00	US	E%sT	1975
			-5:00	-	EST	1975 Apr 27 2:00
			-5:00	US	E%sT
#
# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan,
# switched from EST to CST/CDT in 1973.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule Menominee	1946	only	-	Apr	lastSun	2:00	1:00	D
Rule Menominee	1946	only	-	Sep	lastSun	2:00	0	S
Rule Menominee	1966	only	-	Apr	lastSun	2:00	1:00	D
Rule Menominee	1966	only	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Menominee	-5:50:27 -	LMT	1885 Sep 18 12:00
			-6:00	US	C%sT	1946
			-6:00 Menominee	C%sT	1969 Apr 27 2:00
			-5:00	-	EST	1973 Apr 29 2:00
			-6:00	US	C%sT

# Navassa
# administered by the US Fish and Wildlife Service
# claimed by US under the provisions of the 1856 Guano Islands Act
# also claimed by Haiti
# occupied 1857/1900 by the Navassa Phosphate Co
# US lighthouse 1917/1996-09
# currently uninhabited
# see Mark Fineman, ``An Isle Rich in Guano and Discord'',
# _Los Angeles Times_ (1998-11-10), A1, A10; it cites
# Jimmy Skaggs, _The Great Guano Rush_ (1994).

################################################################################


# From Paul Eggert (2006-03-22):
# A good source for time zone historical data outside the U.S. is
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
# San Diego: ACS Publications, Inc. (2003).
#
# Gwillim Law writes that a good source
# for recent time zone data is the International Air Transport
# Association's Standard Schedules Information Manual (IATA SSIM),
# published semiannually.  Law sent in several helpful summaries
# of the IATA's data after 1990.
#
# Except where otherwise noted, Shanks & Pottenger is the source for
# entries through 1990, and IATA SSIM is the source for entries afterwards.
#
# Other sources occasionally used include:
#
#	Edward W. Whitman, World Time Differences,
#	Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated),
#	which I found in the UCLA library.
#
#	<a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf">
#	William Willett, The Waste of Daylight, 19th edition
#	</a> (1914-03)
#
# See the `europe' file for Greenland.

# Canada

# From Alain LaBont<e'> (1994-11-14):
# I post here the time zone abbreviations standardized in Canada
# for both English and French in the CAN/CSA-Z234.4-89 standard....
#
#	UTC	Standard time	Daylight savings time
#	offset	French	English	French	English
#	-2:30	-	-	HAT	NDT
#	-3	-	-	HAA	ADT
#	-3:30	HNT	NST	-	-
#	-4	HNA	AST	HAE	EDT
#	-5	HNE	EST	HAC	CDT
#	-6	HNC	CST	HAR	MDT
#	-7	HNR	MST	HAP	PDT
#	-8	HNP	PST	HAY	YDT
#	-9	HNY	YST	-	-
#
#	HN: Heure Normale	ST: Standard Time
#	HA: Heure Avanc<e'>e	DT: Daylight saving Time
#
#	A: de l'Atlantique	Atlantic
#	C: du Centre		Central
#	E: de l'Est		Eastern
#	M:			Mountain
#	N:			Newfoundland
#	P: du Pacifique		Pacific
#	R: des Rocheuses
#	T: de Terre-Neuve
#	Y: du Yukon		Yukon
#
# From Paul Eggert (1994-11-22):
# Alas, this sort of thing must be handled by localization software.

# Unless otherwise specified, the data for Canada are all from Shanks
# & Pottenger.

# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31,
# 2007-03-01):
# The British Columbia government announced yesterday that it will
# adjust daylight savings next year to align with changes in the
# U.S. and the rest of Canada....
# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm
# ...
# Nova Scotia
# Daylight saving time will be extended by four weeks starting in 2007....
# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf
#
# [For New Brunswick] the new legislation dictates that the time change is to
# be done at 02:00 instead of 00:01.
# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf
# ...
# Manitoba has traditionally changed the clock every fall at 03:00.
# As of 2006, the transition is to take place one hour earlier at 02:00.
# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php
# ...
# [Alberta, Ontario, Quebec] will follow US rules.
# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM
# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm
# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF
# ...
# P.E.I. will follow US rules....
# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf
# ...
# Province of Newfoundland and Labrador....
# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm
# ...
# Yukon
# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf
# ...
# N.W.T. will follow US rules.  Whoever maintains the government web site
# does not seem to believe in bookmarks.  To see the news release, click the
# following link and search for "Daylight Savings Time Change".  Press the
# "Daylight Savings Time Change" link; it will fire off a popup using
# JavaScript.
# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive
# ...
# Nunavut
# An amendment to the Interpretation Act was registered on February 19/2007....
# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf

# From Paul Eggert (2006-04-25):
# H. David Matthews and Mary Vincent's map
# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp">
# "It's about TIME", _Canadian Geographic_ (September-October 1998)
# </a> contains detailed boundaries for regions observing nonstandard
# time and daylight saving time arrangements in Canada circa 1998.
#
# INMS, the Institute for National Measurement Standards in Ottawa, has <a
# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php">
# information about standard and daylight saving time zones in Canada.
# </a> (updated periodically).
# Its unofficial information is often taken from Matthews and Vincent.

# From Paul Eggert (2006-06-27):
# For now, assume all of DST-observing Canada will fall into line with the
# new US DST rules,

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Canada	1918	only	-	Apr	14	2:00	1:00	D
Rule	Canada	1918	only	-	Oct	31	2:00	0	S
Rule	Canada	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Canada	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Canada	1945	only	-	Sep	30	2:00	0	S
Rule	Canada	1974	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Canada	1974	2006	-	Oct	lastSun	2:00	0	S
Rule	Canada	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
Rule	Canada	2007	max	-	Mar	Sun>=8	2:00	1:00	D
Rule	Canada	2007	max	-	Nov	Sun>=1	2:00	0	S


# Newfoundland and Labrador

# From Paul Eggert (2000-10-02):
# Matthews and Vincent (1998) write that Labrador should use NST/NDT,
# but the only part of Labrador that follows the rules is the
# southeast corner, including Port Hope Simpson and Mary's Harbour,
# but excluding, say, Black Tickle.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	StJohns	1917	only	-	Apr	 8	2:00	1:00	D
Rule	StJohns	1917	only	-	Sep	17	2:00	0	S
# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger.
Rule	StJohns	1919	only	-	May	 5	23:00	1:00	D
Rule	StJohns	1919	only	-	Aug	12	23:00	0	S
# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger.
Rule	StJohns	1920	1935	-	May	Sun>=1	23:00	1:00	D
Rule	StJohns	1920	1935	-	Oct	lastSun	23:00	0	S
# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks &
# Pottenger.
Rule	StJohns	1936	1941	-	May	Mon>=9	0:00	1:00	D
Rule	StJohns	1936	1941	-	Oct	Mon>=2	0:00	0	S
# Whitman gives the following transitions:
# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07
# but go with Shanks & Pottenger and assume they used Canadian rules.
# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives
# Apr 30 - Sep 24; go with Shanks & Pottenger.
Rule	StJohns	1946	1950	-	May	Sun>=8	2:00	1:00	D
Rule	StJohns	1946	1950	-	Oct	Sun>=2	2:00	0	S
Rule	StJohns	1951	1986	-	Apr	lastSun	2:00	1:00	D
Rule	StJohns	1951	1959	-	Sep	lastSun	2:00	0	S
Rule	StJohns	1960	1986	-	Oct	lastSun	2:00	0	S
# From Paul Eggert (2000-10-02):
# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches
# at 00:01 local time.  For now, assume it started in 1987.
Rule	StJohns	1987	only	-	Apr	Sun>=1	0:01	1:00	D
Rule	StJohns	1987	2006	-	Oct	lastSun	0:01	0	S
Rule	StJohns	1988	only	-	Apr	Sun>=1	0:01	2:00	DD
Rule	StJohns	1989	2006	-	Apr	Sun>=1	0:01	1:00	D
Rule	StJohns	2007	max	-	Mar	Sun>=8	0:01	1:00	D
Rule	StJohns	2007	max	-	Nov	Sun>=1	0:01	0	S
#
# St John's has an apostrophe, but Posix file names can't have apostrophes.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/St_Johns	-3:30:52 -	LMT	1884
			-3:30:52 StJohns N%sT	1918
			-3:30:52 Canada	N%sT	1919
			-3:30:52 StJohns N%sT	1935 Mar 30
			-3:30	StJohns	N%sT	1942 May 11
			-3:30	Canada	N%sT	1946
			-3:30	StJohns	N%sT

# most of east Labrador

# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
			-3:30:52 -	NST	1918
			-3:30:52 Canada N%sT	1919
			-3:30:52 -	NST	1935 Mar 30
			-3:30	-	NST	1936
			-3:30	StJohns	N%sT	1942 May 11
			-3:30	Canada	N%sT	1946
			-3:30	StJohns	N%sT	1966 Mar 15 2:00
			-4:00	StJohns	A%sT


# west Labrador, Nova Scotia, Prince Edward I

# From Paul Eggert (2006-03-22):
# Shanks & Pottenger write that since 1970 most of this region has been like
# Halifax.  Many locales did not observe peacetime DST until 1972;
# Glace Bay, NS is the largest that we know of.
# Shanks & Pottenger also write that Liverpool, NS was the only town
# in Canada to observe DST in 1971 but not 1970; for now we'll assume
# this is a typo.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Halifax	1916	only	-	Apr	 1	0:00	1:00	D
Rule	Halifax	1916	only	-	Oct	 1	0:00	0	S
Rule	Halifax	1920	only	-	May	 9	0:00	1:00	D
Rule	Halifax	1920	only	-	Aug	29	0:00	0	S
Rule	Halifax	1921	only	-	May	 6	0:00	1:00	D
Rule	Halifax	1921	1922	-	Sep	 5	0:00	0	S
Rule	Halifax	1922	only	-	Apr	30	0:00	1:00	D
Rule	Halifax	1923	1925	-	May	Sun>=1	0:00	1:00	D
Rule	Halifax	1923	only	-	Sep	 4	0:00	0	S
Rule	Halifax	1924	only	-	Sep	15	0:00	0	S
Rule	Halifax	1925	only	-	Sep	28	0:00	0	S
Rule	Halifax	1926	only	-	May	16	0:00	1:00	D
Rule	Halifax	1926	only	-	Sep	13	0:00	0	S
Rule	Halifax	1927	only	-	May	 1	0:00	1:00	D
Rule	Halifax	1927	only	-	Sep	26	0:00	0	S
Rule	Halifax	1928	1931	-	May	Sun>=8	0:00	1:00	D
Rule	Halifax	1928	only	-	Sep	 9	0:00	0	S
Rule	Halifax	1929	only	-	Sep	 3	0:00	0	S
Rule	Halifax	1930	only	-	Sep	15	0:00	0	S
Rule	Halifax	1931	1932	-	Sep	Mon>=24	0:00	0	S
Rule	Halifax	1932	only	-	May	 1	0:00	1:00	D
Rule	Halifax	1933	only	-	Apr	30	0:00	1:00	D
Rule	Halifax	1933	only	-	Oct	 2	0:00	0	S
Rule	Halifax	1934	only	-	May	20	0:00	1:00	D
Rule	Halifax	1934	only	-	Sep	16	0:00	0	S
Rule	Halifax	1935	only	-	Jun	 2	0:00	1:00	D
Rule	Halifax	1935	only	-	Sep	30	0:00	0	S
Rule	Halifax	1936	only	-	Jun	 1	0:00	1:00	D
Rule	Halifax	1936	only	-	Sep	14	0:00	0	S
Rule	Halifax	1937	1938	-	May	Sun>=1	0:00	1:00	D
Rule	Halifax	1937	1941	-	Sep	Mon>=24	0:00	0	S
Rule	Halifax	1939	only	-	May	28	0:00	1:00	D
Rule	Halifax	1940	1941	-	May	Sun>=1	0:00	1:00	D
Rule	Halifax	1946	1949	-	Apr	lastSun	2:00	1:00	D
Rule	Halifax	1946	1949	-	Sep	lastSun	2:00	0	S
Rule	Halifax	1951	1954	-	Apr	lastSun	2:00	1:00	D
Rule	Halifax	1951	1954	-	Sep	lastSun	2:00	0	S
Rule	Halifax	1956	1959	-	Apr	lastSun	2:00	1:00	D
Rule	Halifax	1956	1959	-	Sep	lastSun	2:00	0	S
Rule	Halifax	1962	1973	-	Apr	lastSun	2:00	1:00	D
Rule	Halifax	1962	1973	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Halifax	-4:14:24 -	LMT	1902 Jun 15
			-4:00	Halifax	A%sT	1918
			-4:00	Canada	A%sT	1919
			-4:00	Halifax	A%sT	1942 Feb  9 2:00s
			-4:00	Canada	A%sT	1946
			-4:00	Halifax	A%sT	1974
			-4:00	Canada	A%sT
Zone America/Glace_Bay	-3:59:48 -	LMT	1902 Jun 15
			-4:00	Canada	A%sT	1953
			-4:00	Halifax	A%sT	1954
			-4:00	-	AST	1972
			-4:00	Halifax	A%sT	1974
			-4:00	Canada	A%sT

# New Brunswick

# From Paul Eggert (2007-01-31):
# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf>
# says they changed at 00:01 through 2006, and
# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it
# clear that this was the case since at least 1993.
# For now, assume it started in 1993.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Moncton	1933	1935	-	Jun	Sun>=8	1:00	1:00	D
Rule	Moncton	1933	1935	-	Sep	Sun>=8	1:00	0	S
Rule	Moncton	1936	1938	-	Jun	Sun>=1	1:00	1:00	D
Rule	Moncton	1936	1938	-	Sep	Sun>=1	1:00	0	S
Rule	Moncton	1939	only	-	May	27	1:00	1:00	D
Rule	Moncton	1939	1941	-	Sep	Sat>=21	1:00	0	S
Rule	Moncton	1940	only	-	May	19	1:00	1:00	D
Rule	Moncton	1941	only	-	May	 4	1:00	1:00	D
Rule	Moncton	1946	1972	-	Apr	lastSun	2:00	1:00	D
Rule	Moncton	1946	1956	-	Sep	lastSun	2:00	0	S
Rule	Moncton	1957	1972	-	Oct	lastSun	2:00	0	S
Rule	Moncton	1993	2006	-	Apr	Sun>=1	0:01	1:00	D
Rule	Moncton	1993	2006	-	Oct	lastSun	0:01	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Moncton	-4:19:08 -	LMT	1883 Dec  9
			-5:00	-	EST	1902 Jun 15
			-4:00	Canada	A%sT	1933
			-4:00	Moncton	A%sT	1942
			-4:00	Canada	A%sT	1946
			-4:00	Moncton	A%sT	1973
			-4:00	Canada	A%sT	1993
			-4:00	Moncton	A%sT	2007
			-4:00	Canada	A%sT

# Quebec

# From Paul Eggert (2006-07-09):
# Shanks & Pottenger write that since 1970 most of Quebec has been
# like Montreal.

# From Paul Eggert (2006-06-27):
# Matthews and Vincent (1998) also write that Quebec east of the -63
# meridian is supposed to observe AST, but residents as far east as
# Natashquan use EST/EDT, and residents east of Natashquan use AST.
# In "Official time in Quebec" the Quebec department of justice writes in
# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm
# that "The residents of the Municipality of the
# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin,
# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is
# written and use Atlantic standard time all year round. The same applies to
# the residents of the Native facilities along the lower North Shore."
# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm>
# says this common practice was codified into law as of 2007.
# For lack of better info, guess this practice began around 1970, contra to
# Shanks & Pottenger who have this region observing AST/ADT.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Mont	1917	only	-	Mar	25	2:00	1:00	D
Rule	Mont	1917	only	-	Apr	24	0:00	0	S
Rule	Mont	1919	only	-	Mar	31	2:30	1:00	D
Rule	Mont	1919	only	-	Oct	25	2:30	0	S
Rule	Mont	1920	only	-	May	 2	2:30	1:00	D
Rule	Mont	1920	1922	-	Oct	Sun>=1	2:30	0	S
Rule	Mont	1921	only	-	May	 1	2:00	1:00	D
Rule	Mont	1922	only	-	Apr	30	2:00	1:00	D
Rule	Mont	1924	only	-	May	17	2:00	1:00	D
Rule	Mont	1924	1926	-	Sep	lastSun	2:30	0	S
Rule	Mont	1925	1926	-	May	Sun>=1	2:00	1:00	D
# The 1927-to-1937 rules can be expressed more simply as
# Rule	Mont	1927	1937	-	Apr	lastSat	24:00	1:00	D
# Rule	Mont	1927	1937	-	Sep	lastSat	24:00	0	S
# The rules below avoid use of 24:00
# (which pre-1998 versions of zic cannot handle).
Rule	Mont	1927	only	-	May	1	0:00	1:00	D
Rule	Mont	1927	1932	-	Sep	lastSun	0:00	0	S
Rule	Mont	1928	1931	-	Apr	lastSun	0:00	1:00	D
Rule	Mont	1932	only	-	May	1	0:00	1:00	D
Rule	Mont	1933	1940	-	Apr	lastSun	0:00	1:00	D
Rule	Mont	1933	only	-	Oct	1	0:00	0	S
Rule	Mont	1934	1939	-	Sep	lastSun	0:00	0	S
Rule	Mont	1946	1973	-	Apr	lastSun	2:00	1:00	D
Rule	Mont	1945	1948	-	Sep	lastSun	2:00	0	S
Rule	Mont	1949	1950	-	Oct	lastSun	2:00	0	S
Rule	Mont	1951	1956	-	Sep	lastSun	2:00	0	S
Rule	Mont	1957	1973	-	Oct	lastSun	2:00	0	S

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Blanc-Sablon -3:48:28 -	LMT	1884
			-4:00	Canada	A%sT	1970
			-4:00	-	AST
Zone America/Montreal	-4:54:16 -	LMT	1884
			-5:00	Mont	E%sT	1918
			-5:00	Canada	E%sT	1919
			-5:00	Mont	E%sT	1942 Feb  9 2:00s
			-5:00	Canada	E%sT	1946
			-5:00	Mont	E%sT	1974
			-5:00	Canada	E%sT


# Ontario

# From Paul Eggert (2006-07-09):
# Shanks & Pottenger write that since 1970 most of Ontario has been like
# Toronto.
# Thunder Bay skipped DST in 1973.
# Many smaller locales did not observe peacetime DST until 1974;
# Nipigon (EST) and Rainy River (CST) are the largest that we know of.
# Far west Ontario is like Winnipeg; far east Quebec is like Halifax.

# From Mark Brader (2003-07-26):
# [According to the Toronto Star] Orillia, Ontario, adopted DST
# effective Saturday, 1912-06-22, 22:00; the article mentions that
# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw
# have already done so.  In Orillia DST was to run until Saturday,
# 1912-08-31 (no time mentioned), but it was met with considerable
# hostility from certain segments of the public, and was revoked after
# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but
# presumably that should be -07-06.  (1912-06-19, -07-12; also letters
# earlier in June).
#
# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21).

# From Paul Eggert (1997-10-17):
# Mark Brader writes that an article in the 1997-10-14 Toronto Star
# says that Atikokan, Ontario currently does not observe DST,
# but will vote on 11-10 whether to use EST/EDT.
# He also writes that the
# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html">
# Ontario Time Act (1990, Chapter T.9)
# </a>
# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT.
# Officially Atikokan is therefore on CST/CDT, and most likely this report
# concerns a non-official time observed as a matter of local practice.
#
# From Paul Eggert (2000-10-02):
# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and
# New Osnaburgh observe CST all year, that Big Trout Lake observes
# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in
# violation of the official Ontario rules.
#
# From Paul Eggert (2006-07-09):
# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the
# 2005-07-21 Chronicle-Journal, which said:
#
#	The clocks in Atikokan stay set on standard time year-round.
#	This means they spend about half the time on central time and
#	the other half on eastern time.
#
#	For the most part, the system works, Mayor Dennis Brown said.
#
#	"The majority of businesses in Atikokan deal more with Eastern
#	Canada, but there are some that deal with Western Canada," he
#	said.  "I don't see any changes happening here."
#
# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang
# [New Osnaburgh] follow the same practice."

# From Garry McKinnon (2006-07-14) via Chris Walton:
# I chatted with a member of my board who has an outstanding memory
# and a long history in Atikokan (and in the telecom industry) and he
# can say for certain that Atikokan has been practicing the current
# time keeping since 1952, at least.

# From Paul Eggert (2006-07-17):
# Shanks & Pottenger say that Atikokan has agreed with Rainy River
# ever since standard time was introduced, but the information from
# McKinnon sounds more authoritative.  For now, assume that Atikokan
# switched to EST immediately after WWII era daylight saving time
# ended.  This matches the old (less-populous) America/Coral_Harbour
# entry since our cutoff date of 1970, so we can move
# America/Coral_Harbour to the 'backward' file.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Toronto	1919	only	-	Mar	30	23:30	1:00	D
Rule	Toronto	1919	only	-	Oct	26	0:00	0	S
Rule	Toronto	1920	only	-	May	 2	2:00	1:00	D
Rule	Toronto	1920	only	-	Sep	26	0:00	0	S
Rule	Toronto	1921	only	-	May	15	2:00	1:00	D
Rule	Toronto	1921	only	-	Sep	15	2:00	0	S
Rule	Toronto	1922	1923	-	May	Sun>=8	2:00	1:00	D
# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16"
# was meant.
Rule	Toronto	1922	1926	-	Sep	Sun>=15	2:00	0	S
Rule	Toronto	1924	1927	-	May	Sun>=1	2:00	1:00	D
# The 1927-to-1939 rules can be expressed more simply as
# Rule	Toronto	1927	1937	-	Sep	Sun>=25	2:00	0	S
# Rule	Toronto	1928	1937	-	Apr	Sun>=25	2:00	1:00	D
# Rule	Toronto	1938	1940	-	Apr	lastSun	2:00	1:00	D
# Rule	Toronto	1938	1939	-	Sep	lastSun	2:00	0	S
# The rules below avoid use of Sun>=25
# (which pre-2004 versions of zic cannot handle).
Rule	Toronto	1927	1932	-	Sep	lastSun	2:00	0	S
Rule	Toronto	1928	1931	-	Apr	lastSun	2:00	1:00	D
Rule	Toronto	1932	only	-	May	1	2:00	1:00	D
Rule	Toronto	1933	1940	-	Apr	lastSun	2:00	1:00	D
Rule	Toronto	1933	only	-	Oct	1	2:00	0	S
Rule	Toronto	1934	1939	-	Sep	lastSun	2:00	0	S
Rule	Toronto	1945	1946	-	Sep	lastSun	2:00	0	S
Rule	Toronto	1946	only	-	Apr	lastSun	2:00	1:00	D
Rule	Toronto	1947	1949	-	Apr	lastSun	0:00	1:00	D
Rule	Toronto	1947	1948	-	Sep	lastSun	0:00	0	S
Rule	Toronto	1949	only	-	Nov	lastSun	0:00	0	S
Rule	Toronto	1950	1973	-	Apr	lastSun	2:00	1:00	D
Rule	Toronto	1950	only	-	Nov	lastSun	2:00	0	S
Rule	Toronto	1951	1956	-	Sep	lastSun	2:00	0	S
# Shanks & Pottenger say Toronto ended DST a week early in 1971,
# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this
# is wrong, and that he had confirmed it by checking the 1971-10-30
# Toronto Star, which said that DST was ending 1971-10-31 as usual.
Rule	Toronto	1957	1973	-	Oct	lastSun	2:00	0	S

# From Paul Eggert (2003-07-27):
# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and
# Port Arthur, Ontario, the principle of the Bill has been in
# operation for the past three years, and in the City of Moose Jaw,
# Saskatchewan, for one year."

# From David Bryan via Tory Tronrud, Director/Curator,
# Thunder Bay Museum (2003-11-12):
# There is some suggestion, however, that, by-law or not, daylight
# savings time was being practiced in Fort William and Port Arthur
# before 1909.... [I]n 1910, the line between the Eastern and Central
# Time Zones was permanently moved about two hundred miles west to
# include the Thunder Bay area....  When Canada adopted daylight
# savings time in 1916, Fort William and Port Arthur, having done so
# already, did not change their clocks....  During the Second World
# War,... [t]he cities agreed to implement DST during the summer
# months for the remainder of the war years.

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Toronto	-5:17:32 -	LMT	1895
			-5:00	Canada	E%sT	1919
			-5:00	Toronto	E%sT	1942 Feb  9 2:00s
			-5:00	Canada	E%sT	1946
			-5:00	Toronto	E%sT	1974
			-5:00	Canada	E%sT
Zone America/Thunder_Bay -5:57:00 -	LMT	1895
			-6:00	-	CST	1910
			-5:00	-	EST	1942
			-5:00	Canada	E%sT	1970
			-5:00	Mont	E%sT	1973
			-5:00	-	EST	1974
			-5:00	Canada	E%sT
Zone America/Nipigon	-5:53:04 -	LMT	1895
			-5:00	Canada	E%sT	1940 Sep 29
			-5:00	1:00	EDT	1942 Feb  9 2:00s
			-5:00	Canada	E%sT
Zone America/Rainy_River -6:18:16 -	LMT	1895
			-6:00	Canada	C%sT	1940 Sep 29
			-6:00	1:00	CDT	1942 Feb  9 2:00s
			-6:00	Canada	C%sT
Zone America/Atikokan	-6:06:28 -	LMT	1895
			-6:00	Canada	C%sT	1940 Sep 29
			-6:00	1:00	CDT	1942 Feb  9 2:00s
			-6:00	Canada	C%sT	1945 Sep 30 2:00
			-5:00	-	EST


# Manitoba

# From Rob Douglas (2006-04-06):
# the old Manitoba Time Act - as amended by Bill 2, assented to
# March 27, 1987 ... said ...
# "between two o'clock Central Standard Time in the morning of
# the first Sunday of April of each year and two o'clock Central
# Standard Time in the morning of the last Sunday of October next
# following, one hour in advance of Central Standard Time."...
# I believe that the English legislation [of the old time act] had =
# been assented to (March 22, 1967)....
# Also, as far as I can tell, there was no order-in-council varying
# the time of Daylight Saving Time for 2005 and so the provisions of
# the 1987 version would apply - the changeover was at 2:00 Central
# Standard Time (i.e. not until 3:00 Central Daylight Time).

# From Paul Eggert (2006-04-10):
# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s)
# starting 1966.  Since 02:00s is clearly correct for 1967 on, assume
# it was also 02:00s in 1966.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Winn	1916	only	-	Apr	23	0:00	1:00	D
Rule	Winn	1916	only	-	Sep	17	0:00	0	S
Rule	Winn	1918	only	-	Apr	14	2:00	1:00	D
Rule	Winn	1918	only	-	Oct	31	2:00	0	S
Rule	Winn	1937	only	-	May	16	2:00	1:00	D
Rule	Winn	1937	only	-	Sep	26	2:00	0	S
Rule	Winn	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Winn	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Winn	1945	only	-	Sep	lastSun	2:00	0	S
Rule	Winn	1946	only	-	May	12	2:00	1:00	D
Rule	Winn	1946	only	-	Oct	13	2:00	0	S
Rule	Winn	1947	1949	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1947	1949	-	Sep	lastSun	2:00	0	S
Rule	Winn	1950	only	-	May	 1	2:00	1:00	D
Rule	Winn	1950	only	-	Sep	30	2:00	0	S
Rule	Winn	1951	1960	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1951	1958	-	Sep	lastSun	2:00	0	S
Rule	Winn	1959	only	-	Oct	lastSun	2:00	0	S
Rule	Winn	1960	only	-	Sep	lastSun	2:00	0	S
Rule	Winn	1963	only	-	Apr	lastSun	2:00	1:00	D
Rule	Winn	1963	only	-	Sep	22	2:00	0	S
Rule	Winn	1966	1986	-	Apr	lastSun	2:00s	1:00	D
Rule	Winn	1966	2005	-	Oct	lastSun	2:00s	0	S
Rule	Winn	1987	2005	-	Apr	Sun>=1	2:00s	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Winnipeg	-6:28:36 -	LMT	1887 Jul 16
			-6:00	Winn	C%sT	2006
			-6:00	Canada	C%sT


# Saskatchewan

# From Mark Brader (2003-07-26):
# The first actual adoption of DST in Canada was at the municipal
# level.  As the [Toronto] Star put it (1912-06-07), "While people
# elsewhere have long been talking of legislation to save daylight,
# the city of Moose Jaw [Saskatchewan] has acted on its own hook."
# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned:
# presumably late evening, as below), and would run until "the end of
# the summer".  The discrepancy between municipal time and railroad
# time was noted.

# From Paul Eggert (2003-07-27):
# Willett (1914-03) notes that DST "has been in operation ... in the
# City of Moose Jaw, Saskatchewan, for one year."

# From Paul Eggert (2006-03-22):
# Shanks & Pottenger say that since 1970 this region has mostly been as Regina.
# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972.
# Other western towns (e.g. Lloydminster) are like Edmonton.
# Matthews and Vincent (1998) write that Denare Beach and Creighton
# are like Winnipeg, in violation of Saskatchewan law.

# From W. Jones (1992-11-06):
# The. . .below is based on information I got from our law library, the
# provincial archives, and the provincial Community Services department.
# A precise history would require digging through newspaper archives, and
# since you didn't say what you wanted, I didn't bother.
#
# Saskatchewan is split by a time zone meridian (105W) and over the years
# the boundary became pretty ragged as communities near it reevaluated
# their affiliations in one direction or the other.  In 1965 a provincial
# referendum favoured legislating common time practices.
#
# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of
# Saskatchewan 1978) was proclaimed, and established that the eastern
# part of Saskatchewan would use CST year round, that districts in
# northwest Saskatchewan would by default follow CST but could opt to
# follow Mountain Time rules (thus 1 hour difference in the winter and
# zero in the summer), and that districts in southwest Saskatchewan would
# by default follow MT but could opt to follow CST.
#
# It took a few years for the dust to settle (I know one story of a town
# on one time zone having its school in another, such that a mom had to
# serve her family lunch in two shifts), but presently it seems that only
# a few towns on the border with Alberta (e.g. Lloydminster) follow MT
# rules any more; all other districts appear to have used CST year round
# since sometime in the 1960s.

# From Chris Walton (2006-06-26):
# The Saskatchewan time act which was last updated in 1996 is about 30 pages
# long and rather painful to read.
# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Regina	1918	only	-	Apr	14	2:00	1:00	D
Rule	Regina	1918	only	-	Oct	31	2:00	0	S
Rule	Regina	1930	1934	-	May	Sun>=1	0:00	1:00	D
Rule	Regina	1930	1934	-	Oct	Sun>=1	0:00	0	S
Rule	Regina	1937	1941	-	Apr	Sun>=8	0:00	1:00	D
Rule	Regina	1937	only	-	Oct	Sun>=8	0:00	0	S
Rule	Regina	1938	only	-	Oct	Sun>=1	0:00	0	S
Rule	Regina	1939	1941	-	Oct	Sun>=8	0:00	0	S
Rule	Regina	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Regina	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Regina	1945	only	-	Sep	lastSun	2:00	0	S
Rule	Regina	1946	only	-	Apr	Sun>=8	2:00	1:00	D
Rule	Regina	1946	only	-	Oct	Sun>=8	2:00	0	S
Rule	Regina	1947	1957	-	Apr	lastSun	2:00	1:00	D
Rule	Regina	1947	1957	-	Sep	lastSun	2:00	0	S
Rule	Regina	1959	only	-	Apr	lastSun	2:00	1:00	D
Rule	Regina	1959	only	-	Oct	lastSun	2:00	0	S
#
Rule	Swift	1957	only	-	Apr	lastSun	2:00	1:00	D
Rule	Swift	1957	only	-	Oct	lastSun	2:00	0	S
Rule	Swift	1959	1961	-	Apr	lastSun	2:00	1:00	D
Rule	Swift	1959	only	-	Oct	lastSun	2:00	0	S
Rule	Swift	1960	1961	-	Sep	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Regina	-6:58:36 -	LMT	1905 Sep
			-7:00	Regina	M%sT	1960 Apr lastSun 2:00
			-6:00	-	CST
Zone America/Swift_Current -7:11:20 -	LMT	1905 Sep
			-7:00	Canada	M%sT	1946 Apr lastSun 2:00
			-7:00	Regina	M%sT	1950
			-7:00	Swift	M%sT	1972 Apr lastSun 2:00
			-6:00	-	CST


# Alberta

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Edm	1918	1919	-	Apr	Sun>=8	2:00	1:00	D
Rule	Edm	1918	only	-	Oct	31	2:00	0	S
Rule	Edm	1919	only	-	May	27	2:00	0	S
Rule	Edm	1920	1923	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1920	only	-	Oct	lastSun	2:00	0	S
Rule	Edm	1921	1923	-	Sep	lastSun	2:00	0	S
Rule	Edm	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Edm	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Edm	1945	only	-	Sep	lastSun	2:00	0	S
Rule	Edm	1947	only	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1947	only	-	Sep	lastSun	2:00	0	S
Rule	Edm	1967	only	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1967	only	-	Oct	lastSun	2:00	0	S
Rule	Edm	1969	only	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1969	only	-	Oct	lastSun	2:00	0	S
Rule	Edm	1972	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Edm	1972	2006	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
			-7:00	Edm	M%sT	1987
			-7:00	Canada	M%sT


# British Columbia

# From Paul Eggert (2006-03-22):
# Shanks & Pottenger write that since 1970 most of this region has
# been like Vancouver.
# Dawson Creek uses MST.  Much of east BC is like Edmonton.
# Matthews and Vincent (1998) write that Creston is like Dawson Creek.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
Rule	Vanc	1918	only	-	Oct	31	2:00	0	S
Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
Rule	Vanc	1946	1986	-	Apr	lastSun	2:00	1:00	D
Rule	Vanc	1946	only	-	Oct	13	2:00	0	S
Rule	Vanc	1947	1961	-	Sep	lastSun	2:00	0	S
Rule	Vanc	1962	2006	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Vancouver	-8:12:28 -	LMT	1884
			-8:00	Vanc	P%sT	1987
			-8:00	Canada	P%sT
Zone America/Dawson_Creek -8:00:56 -	LMT	1884
			-8:00	Canada	P%sT	1947
			-8:00	Vanc	P%sT	1972 Aug 30 2:00
			-7:00	-	MST


# Northwest Territories, Nunavut, Yukon

# From Paul Eggert (2006-03-22):
# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
# Mathew Englander (1996-10-07) gives the following refs:
#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
#	c. 7 defines Yukon standard time as UTC-9.  This is still valid;
#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
#	* O.I.C. 1980/02 established DST.
#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go
# with Englander.
# From Chris Walton (2006-06-26):
# Here is a link to the old daylight saving portion of the interpretation
# act which was last updated in 1987:
# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf

# From Rives McDow (1999-09-04):
# Nunavut ... moved ... to incorporate the whole territory into one time zone.
# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html">
# Nunavut moves to single time zone Oct. 31
# </a>
#
# From Antoine Leca (1999-09-06):
# We then need to create a new timezone for the Kitikmeot region of Nunavut
# to differentiate it from the Yellowknife region.

# From Paul Eggert (1999-09-20):
# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html">
# Basic Facts: The New Territory
# </a> (1999) reports that Pangnirtung operates on eastern time,
# and that Coral Harbour does not observe DST.  We don't know when
# Pangnirtung switched to eastern time; we'll guess 1995.

# From Rives McDow (1999-11-08):
# On October 31, when the rest of Nunavut went to Central time,
# Pangnirtung wobbled.  Here is the result of their wobble:
#
# The following businesses and organizations in Pangnirtung use Central Time:
#
#	First Air, Power Corp, Nunavut Construction, Health Center, RCMP,
#	Eastern Arctic National Parks, A & D Specialist
#
# The following businesses and organizations in Pangnirtung use Eastern Time:
#
#	Hamlet office, All other businesses, Both schools, Airport operator
#
# This has made for an interesting situation there, which warranted the news.
# No one there that I spoke with seems concerned, or has plans to
# change the local methods of keeping time, as it evidently does not
# really interfere with any activities or make things difficult locally.
# They plan to celebrate New Year's turn-over twice, one hour apart,
# so it appears that the situation will last at least that long.
# The Nunavut Intergovernmental Affairs hopes that they will "come to
# their senses", but the locals evidently don't see any problem with
# the current state of affairs.

# From Michaela Rodrigue, writing in the
# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html">
# Nunatsiaq News (1999-11-19)</a>:
# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones,
# central - or Nunavut time - for government offices, and eastern time
# for municipal offices and schools....  Igloolik [was similar but then]
# made the switch to central time on Saturday, Nov. 6.

# From Paul Eggert (2000-10-02):
# Matthews and Vincent (1998) say the following, but we lack histories
# for these potential new Zones.
#
# The Canadian Forces station at Alert uses Eastern Time while the
# handful of residents at the Eureka weather station [in the Central
# zone] skip daylight savings.  Baffin Island, which is crossed by the
# Central, Eastern and Atlantic Time zones only uses Eastern Time.
# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of
# Central Time and Southampton Island [in the Central zone] is not
# required to use daylight savings.

# From
# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html">
# Nunavut now has two time zones
# </a> (2000-11-10):
# The Nunavut government would allow its employees in Kugluktuk and
# Cambridge Bay to operate on central time year-round, putting them
# one hour behind the rest of Nunavut for six months during the winter.
# At the end of October the two communities had rebelled against
# Nunavut's unified time zone, refusing to shift to eastern time with
# the rest of the territory for the winter.  Cambridge Bay remained on
# central time, while Kugluktuk, even farther west, reverted to
# mountain time, which they had used before the advent of Nunavut's
# unified time zone in 1999.
#
# From Rives McDow (2001-01-20), quoting the Nunavut government:
# The preceding decision came into effect at midnight, Saturday Nov 4, 2000.

# From Paul Eggert (2000-12-04):
# Let's just keep track of the official times for now.

# From Rives McDow (2001-03-07):
# The premier of Nunavut has issued a ministerial statement advising
# that effective 2001-04-01, the territory of Nunavut will revert
# back to three time zones (mountain, central, and eastern).  Of the
# cities in Nunavut, Coral Harbor is the only one that I know of that
# has said it will not observe dst, staying on EST year round.  I'm
# checking for more info, and will get back to you if I come up with
# more.
# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).]

# From Gwillim Law (2005-05-21):
# According to maps at
# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg
# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg
# (both dated 2003), and
# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp
# (from a 1998 Canadian Geographic article), the de facto and de jure time
# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year
# round.  Using Google, it's easy to find other websites that confirm this.
# I wasn't able to find how far back this time regimen goes, but since it
# predates the creation of Nunavut, it probably goes back many years....
# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used.
#
# From Paul Eggert (2005-07-26):
# For lack of better information, assume that Southampton Island observed
# daylight saving only during wartime.

# From Chris Walton (2007-03-01):
# ... the community of Resolute (located on Cornwallis Island in
# Nunavut) moved from Central Time to Eastern Time last November.
# Basically the community did not change its clocks at the end of
# daylight saving....
# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html

# From Chris Walton (2007-03-14):
# Today I phoned the "hamlet office" to find out what Resolute was doing with
# its clocks.
#
# The individual that answered the phone confirmed that the clocks did not
# move at the end of daylight saving on October 29/2006.  He also told me that
# the clocks did not move this past weekend (March 11/2007)....
#
# America/Resolute should use the "Canada" Rule up to October 29/2006.
# After that it should be fixed on Eastern Standard Time until further notice.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
Rule	NT_YK	1918	only	-	Oct	27	2:00	0	S
Rule	NT_YK	1919	only	-	May	25	2:00	1:00	D
Rule	NT_YK	1919	only	-	Nov	 1	0:00	0	S
Rule	NT_YK	1942	only	-	Feb	 9	2:00	1:00	W # War
Rule	NT_YK	1945	only	-	Aug	14	23:00u	1:00	P # Peace
Rule	NT_YK	1945	only	-	Sep	30	2:00	0	S
Rule	NT_YK	1965	only	-	Apr	lastSun	0:00	2:00	DD
Rule	NT_YK	1965	only	-	Oct	lastSun	2:00	0	S
Rule	NT_YK	1980	1986	-	Apr	lastSun	2:00	1:00	D
Rule	NT_YK	1980	2006	-	Oct	lastSun	2:00	0	S
Rule	NT_YK	1987	2006	-	Apr	Sun>=1	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
# aka Panniqtuuq
Zone America/Pangnirtung 0	-	zzz	1921 # trading post est.
			-4:00	NT_YK	A%sT	1995 Apr Sun>=1 2:00
			-5:00	Canada	E%sT	1999 Oct 31 2:00
			-6:00	Canada	C%sT	2000 Oct 29 2:00
			-5:00	Canada	E%sT
# formerly Frobisher Bay
Zone America/Iqaluit	0	-	zzz	1942 Aug # Frobisher Bay est.
			-5:00	NT_YK	E%sT	1999 Oct 31 2:00
			-6:00	Canada	C%sT	2000 Oct 29 2:00
			-5:00	Canada	E%sT
# aka Qausuittuq
Zone America/Resolute	0	-	zzz	1947 Aug 31 # Resolute founded
			-6:00	NT_YK	C%sT	2000 Oct 29 2:00
			-5:00	-	EST	2001 Apr  1 3:00
			-6:00	Canada	C%sT	2006 Oct 29 2:00
			-5:00	-	EST
# aka Kangiqiniq
Zone America/Rankin_Inlet 0	-	zzz	1957 # Rankin Inlet founded
			-6:00	NT_YK	C%sT	2000 Oct 29 2:00
			-5:00	-	EST	2001 Apr  1 3:00
			-6:00	Canada	C%sT
# aka Iqaluktuuttiaq
Zone America/Cambridge_Bay 0	-	zzz	1920 # trading post est.?
			-7:00	NT_YK	M%sT	1999 Oct 31 2:00
			-6:00	Canada	C%sT	2000 Oct 29 2:00
			-5:00	-	EST	2000 Nov  5 0:00
			-6:00	-	CST	2001 Apr  1 3:00
			-7:00	Canada	M%sT
Zone America/Yellowknife 0	-	zzz	1935 # Yellowknife founded?
			-7:00	NT_YK	M%sT	1980
			-7:00	Canada	M%sT
Zone America/Inuvik	0	-	zzz	1953 # Inuvik founded
			-8:00	NT_YK	P%sT	1979 Apr lastSun 2:00
			-7:00	NT_YK	M%sT	1980
			-7:00	Canada	M%sT
Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
			-9:00	NT_YK	Y%sT	1966 Jul 1 2:00
			-8:00	NT_YK	P%sT	1980
			-8:00	Canada	P%sT
Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
			-9:00	NT_YK	Y%sT	1973 Oct 28 0:00
			-8:00	NT_YK	P%sT	1980
			-8:00	Canada	P%sT


###############################################################################

# Mexico

# From Paul Eggert (2001-03-05):
# The Investigation and Analysis Service of the
# Mexican Library of Congress (MLoC) has published a
# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/">
# history of Mexican local time (in Spanish)
# </a>.
#
# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC.
# (In all cases we go with the MLoC.)
# S&P report that Baja was at -8:00 in 1922/1923.
# S&P say the 1930 transition in Baja was 1930-11-16.
# S&P report no DST during summer 1931.
# S&P report a transition at 1932-03-30 23:00, not 1932-04-01.

# From Gwillim Law (2001-02-20):
# There are some other discrepancies between the Decrees page and the
# tz database.  I think they can best be explained by supposing that
# the researchers who prepared the Decrees page failed to find some of
# the relevant documents.

# From Alan Perry (1996-02-15):
# A guy from our Mexico subsidiary finally found the Presidential Decree
# outlining the timezone changes in Mexico.
#
# ------------- Begin Forwarded Message -------------
#
# I finally got my hands on the Official Presidential Decree that sets up the
# rules for the DST changes. The rules are:
#
# 1. The country is divided in 3 timezones:
#    - Baja California Norte (the Mexico/BajaNorte TZ)
#    - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ)
#    - The rest of the country (the Mexico/General TZ)
#
# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October
#    at 2:00 AM, the times in each zone are as follows:
#    BajaNorte: GMT+7
#    BajaSur:   GMT+6
#    General:   GMT+5
#
# 3. The rest of the year, the times are as follows:
#    BajaNorte: GMT+8
#    BajaSur:   GMT+7
#    General:   GMT+6
#
# The Decree was published in Mexico's Official Newspaper on January 4th.
#
# -------------- End Forwarded Message --------------
# From Paul Eggert (1996-06-12):
# For an English translation of the decree, see
# <a href="http://mexico-travel.com/extra/timezone_eng.html">
# ``Diario Oficial: Time Zone Changeover'' (1996-01-04).
# </a>

# From Rives McDow (1998-10-08):
# The State of Quintana Roo has reverted back to central STD and DST times
# (i.e. UTC -0600 and -0500 as of 1998-08-02).

# From Rives McDow (2000-01-10):
# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time
# zone 5 hours from the International Date Line, and will not observe daylight
# savings time so as to stay on the same time zone as the southern part of
# Arizona year round.

# From Jesper Norgaard, translating
# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17):
# In Oaxaca, the 55.000 teachers from the Section 22 of the National
# Syndicate of Education Workers, refuse to apply daylight saving each
# year, so that the more than 10,000 schools work at normal hour the
# whole year.

# From Gwillim Law (2001-01-19):
# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says
# (translated):...
# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced
# that Summer Time will be reduced from seven to five months, starting
# this year....
# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001>
# [translated], says "summer time will ... take effect on the first Sunday
# in May, and end on the last Sunday of September.

# From Arthur David Olson (2001-01-25):
# The 2001-01-24 traditional Washington Post contained the page one
# story "Timely Issue Divides Mexicans."...
# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html
# ... Mexico City Mayor Lopez Obrador "...is threatening to keep
# Mexico City and its 20 million residents on a different time than
# the rest of the country..." In particular, Lopez Obrador would abolish
# observation of Daylight Saving Time.

# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre">
# Official statute published by the Energy Department
# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules,
# and Sonora with no DST.  This was reported by Jesper Norgaard (2001-02-03).

# From Paul Eggert (2001-03-03):
#
# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html">
# James F. Smith writes in today's LA Times
# </a>
# * Sonora will continue to observe standard time.
# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that
#   the Federal District will not adopt DST.
# * 4 of 16 district leaders announced they'll ignore the decree.
# * The decree does not affect federal-controlled facilities including
#   the airport, banks, hospitals, and schools.
#
# For now we'll assume that the Federal District will bow to federal rules.

# From Jesper Norgaard (2001-04-01):
# I found some references to the Mexican application of daylight
# saving, which modifies what I had already sent you, stating earlier
# that a number of northern Mexican states would go on daylight
# saving. The modification reverts this to only cover Baja California
# (Norte), while all other states (except Sonora, who has no daylight
# saving all year) will follow the original decree of president
# Vicente Fox, starting daylight saving May 6, 2001 and ending
# September 30, 2001.
# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp>
# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31)

# From Reuters (2001-09-04):
# Mexico's Supreme Court on Tuesday declared that daylight savings was
# unconstitutional in Mexico City, creating the possibility the
# capital will be in a different time zone from the rest of the nation
# next year....  The Supreme Court's ruling takes effect at 2:00
# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to
# standard time. "This is so residents of the Federal District are not
# subject to unexpected time changes," a statement from the court said.

# From Jesper Norgaard Welen (2002-03-12):
# ... consulting my local grocery store(!) and my coworkers, they all insisted
# that a new decision had been made to reinstate US style DST in Mexico....
# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20)
# confirms this.  Sonora as usual is the only state where DST is not applied.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
Rule	Mexico	1940	only	-	Dec	9	0:00	1:00	D
Rule	Mexico	1941	only	-	Apr	1	0:00	0	S
Rule	Mexico	1943	only	-	Dec	16	0:00	1:00	W # War
Rule	Mexico	1944	only	-	May	1	0:00	0	S
Rule	Mexico	1950	only	-	Feb	12	0:00	1:00	D
Rule	Mexico	1950	only	-	Jul	30	0:00	0	S
Rule	Mexico	1996	2000	-	Apr	Sun>=1	2:00	1:00	D
Rule	Mexico	1996	2000	-	Oct	lastSun	2:00	0	S
Rule	Mexico	2001	only	-	May	Sun>=1	2:00	1:00	D
Rule	Mexico	2001	only	-	Sep	lastSun	2:00	0	S
Rule	Mexico	2002	max	-	Apr	Sun>=1	2:00	1:00	D
Rule	Mexico	2002	max	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
# Quintana Roo
Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
			-6:00	-	CST	1981 Dec 23
			-5:00	Mexico	E%sT	1998 Aug  2  2:00
			-6:00	Mexico	C%sT
# Campeche, Yucatan
Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
			-6:00	-	CST	1981 Dec 23
			-5:00	-	EST	1982 Dec  2
			-6:00	Mexico	C%sT
# Coahuila, Durango, Nuevo Leon, Tamaulipas
Zone America/Monterrey	-6:41:16 -	LMT	1921 Dec 31 23:18:44
			-6:00	-	CST	1988
			-6:00	US	C%sT	1989
			-6:00	Mexico	C%sT
# Central Mexico
Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
			-7:00	-	MST	1927 Jun 10 23:00
			-6:00	-	CST	1930 Nov 15
			-7:00	-	MST	1931 May  1 23:00
			-6:00	-	CST	1931 Oct
			-7:00	-	MST	1932 Apr  1
			-6:00	Mexico	C%sT	2001 Sep 30 02:00
			-6:00	-	CST	2002 Feb 20
			-6:00	Mexico	C%sT
# Chihuahua
Zone America/Chihuahua	-7:04:20 -	LMT	1921 Dec 31 23:55:40
			-7:00	-	MST	1927 Jun 10 23:00
			-6:00	-	CST	1930 Nov 15
			-7:00	-	MST	1931 May  1 23:00
			-6:00	-	CST	1931 Oct
			-7:00	-	MST	1932 Apr  1
			-6:00	-	CST	1996
			-6:00	Mexico	C%sT	1998
			-6:00	-	CST	1998 Apr Sun>=1 3:00
			-7:00	Mexico	M%sT
# Sonora
Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
			-7:00	-	MST	1927 Jun 10 23:00
			-6:00	-	CST	1930 Nov 15
			-7:00	-	MST	1931 May  1 23:00
			-6:00	-	CST	1931 Oct
			-7:00	-	MST	1932 Apr  1
			-6:00	-	CST	1942 Apr 24
			-7:00	-	MST	1949 Jan 14
			-8:00	-	PST	1970
			-7:00	Mexico	M%sT	1999
			-7:00	-	MST
# Baja California Sur, Nayarit, Sinaloa
Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
			-7:00	-	MST	1927 Jun 10 23:00
			-6:00	-	CST	1930 Nov 15
			-7:00	-	MST	1931 May  1 23:00
			-6:00	-	CST	1931 Oct
			-7:00	-	MST	1932 Apr  1
			-6:00	-	CST	1942 Apr 24
			-7:00	-	MST	1949 Jan 14
			-8:00	-	PST	1970
			-7:00	Mexico	M%sT
# Baja California
Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
			-7:00	-	MST	1924
			-8:00	-	PST	1927 Jun 10 23:00
			-7:00	-	MST	1930 Nov 15
			-8:00	-	PST	1931 Apr  1
			-8:00	1:00	PDT	1931 Sep 30
			-8:00	-	PST	1942 Apr 24
			-8:00	1:00	PWT	1945 Aug 14 23:00u
			-8:00	1:00	PPT	1945 Nov 12 # Peace
			-8:00	-	PST	1948 Apr  5
			-8:00	1:00	PDT	1949 Jan 14
			-8:00	-	PST	1954
			-8:00	CA	P%sT	1961
			-8:00	-	PST	1976
			-8:00	US	P%sT	1996
			-8:00	Mexico	P%sT	2001
			-8:00	US	P%sT	2002 Feb 20
			-8:00	Mexico	P%sT
# From Paul Eggert (2006-03-22):
# Formerly there was an America/Ensenada zone, which differed from
# America/Tijuana only in that it did not observe DST from 1976
# through 1995.  This was as per Shanks (1999).  But Shanks & Pottenger say
# Ensenada did not observe DST from 1948 through 1975.  Guy Harris reports
# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and
# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that
# DST-observance was a town-by-town matter back then.  This concerns
# data after 1970 so most likely there should be at least one Zone
# other than America/Tijuana for Baja, but it's not clear yet what its
# name or contents should be.
#
# Revillagigedo Is
# no information

###############################################################################

# Anguilla
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Anguilla	-4:12:16 -	LMT	1912 Mar 2
			-4:00	-	AST

# Antigua and Barbuda
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Antigua	-4:07:12 -	LMT	1912 Mar 2
			-5:00	-	EST	1951
			-4:00	-	AST

# Bahamas
#
# From Sue Williams (2006-12-07):
# The Bahamas announced about a month ago that they plan to change their DST
# rules to sync with the U.S. starting in 2007....
# http://www.jonesbahamas.com/?c=45&a=10412

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Bahamas	1964	2006	-	Oct	lastSun	2:00	0	S
Rule	Bahamas	1964	1986	-	Apr	lastSun	2:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Nassau	-5:09:24 -	LMT	1912 Mar 2
			-5:00	Bahamas	E%sT	1976
			-5:00	US	E%sT

# Barbados
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Barb	1977	only	-	Jun	12	2:00	1:00	D
Rule	Barb	1977	1978	-	Oct	Sun>=1	2:00	0	S
Rule	Barb	1978	1980	-	Apr	Sun>=15	2:00	1:00	D
Rule	Barb	1979	only	-	Sep	30	2:00	0	S
Rule	Barb	1980	only	-	Sep	25	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Barbados	-3:58:28 -	LMT	1924		# Bridgetown
			-3:58:28 -	BMT	1932	  # Bridgetown Mean Time
			-4:00	Barb	A%sT

# Belize
# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Belize	1918	1942	-	Oct	Sun>=2	0:00	0:30	HD
Rule	Belize	1919	1943	-	Feb	Sun>=9	0:00	0	S
Rule	Belize	1973	only	-	Dec	 5	0:00	1:00	D
Rule	Belize	1974	only	-	Feb	 9	0:00	0	S
Rule	Belize	1982	only	-	Dec	18	0:00	1:00	D
Rule	Belize	1983	only	-	Feb	12	0:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Belize	-5:52:48 -	LMT	1912 Apr
			-6:00	Belize	C%sT

# Bermuda

# From Dan Jones, reporting in The Royal Gazette (2006-06-26):

# Next year, however, clocks in the US will go forward on the second Sunday
# in March, until the first Sunday in November.  And, after the Time Zone
# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on
# Friday, the same thing will happen in Bermuda.
# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone Atlantic/Bermuda	-4:19:04 -	LMT	1930 Jan  1 2:00    # Hamilton
			-4:00	-	AST	1974 Apr 28 2:00
			-4:00	Bahamas	A%sT	1976
			-4:00	US	A%sT

# Cayman Is
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Cayman	-5:25:32 -	LMT	1890		# Georgetown
			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
			-5:00	-	EST

# Costa Rica
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	CR	1979	1980	-	Feb	lastSun	0:00	1:00	D
Rule	CR	1979	1980	-	Jun	Sun>=1	0:00	0	S
Rule	CR	1991	1992	-	Jan	Sat>=15	0:00	1:00	D
# IATA SSIM (1991-09) says the following was at 1:00;
# go with Shanks & Pottenger.
Rule	CR	1991	only	-	Jul	 1	0:00	0	S
Rule	CR	1992	only	-	Mar	15	0:00	0	S
# There are too many San Joses elsewhere, so we'll use `Costa Rica'.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Costa_Rica	-5:36:20 -	LMT	1890		# San Jose
			-5:36:20 -	SJMT	1921 Jan 15 # San Jose Mean Time
			-6:00	CR	C%sT
# Coco
# no information; probably like America/Costa_Rica

# Cuba

# From Arthur David Olson (1999-03-29):
# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between
# the Cuban National Team and the Baltimore Orioles was carried live on
# the Orioles Radio Network, including affiliate WTOP in Washington, DC.
# During the game, play-by-play announcer Jim Hunter noted that
# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving
# Time today."  (The "two hour" remark referred to losing one hour of
# sleep on 1999-03-28--when the announcers were in Cuba as it switched
# to DST--and one more hour on 1999-04-04--when the announcers will have
# returned to Baltimore, which switches on that date.)

# From Evert van der Veer via Steffen Thorsen (2004-10-28):
# Cuba is not going back to standard time this year.
# From Paul Eggert (2006-03-22):
# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html
# says that it's due to a problem at the Antonio Guiteras
# thermoelectric plant, and says "This October there will be no return
# to normal hours (after daylight saving time)".
# For now, let's assume that it's a temporary measure.

# From Carlos A. Carnero Delgado (2005-11-12):
# This year (just like in 2004-2005) there's no change in time zone
# adjustment in Cuba.  We will stay in daylight saving time:
# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html

# From Jesper Norgaard Welen (2006-10-21):
# An article in GRANMA INTERNACIONAL claims that Cuba will end
# the 3 years of permanent DST next weekend, see
# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html
# "On Saturday night, October 28 going into Sunday, October 29, at 01:00,
# watches should be set back one hour -- going back to 00:00 hours -- returning
# to the normal schedule....

# From Paul Eggert (2007-03-02):
# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday,
# says Cuban clocks will advance at midnight on March 10.
# For lack of better information, assume Cuba will use US rules,
# except that it switches at midnight standard time as usual.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Cuba	1928	only	-	Jun	10	0:00	1:00	D
Rule	Cuba	1928	only	-	Oct	10	0:00	0	S
Rule	Cuba	1940	1942	-	Jun	Sun>=1	0:00	1:00	D
Rule	Cuba	1940	1942	-	Sep	Sun>=1	0:00	0	S
Rule	Cuba	1945	1946	-	Jun	Sun>=1	0:00	1:00	D
Rule	Cuba	1945	1946	-	Sep	Sun>=1	0:00	0	S
Rule	Cuba	1965	only	-	Jun	1	0:00	1:00	D
Rule	Cuba	1965	only	-	Sep	30	0:00	0	S
Rule	Cuba	1966	only	-	May	29	0:00	1:00	D
Rule	Cuba	1966	only	-	Oct	2	0:00	0	S
Rule	Cuba	1967	only	-	Apr	8	0:00	1:00	D
Rule	Cuba	1967	1968	-	Sep	Sun>=8	0:00	0	S
Rule	Cuba	1968	only	-	Apr	14	0:00	1:00	D
Rule	Cuba	1969	1977	-	Apr	lastSun	0:00	1:00	D
Rule	Cuba	1969	1971	-	Oct	lastSun	0:00	0	S
Rule	Cuba	1972	1974	-	Oct	8	0:00	0	S
Rule	Cuba	1975	1977	-	Oct	lastSun	0:00	0	S
Rule	Cuba	1978	only	-	May	7	0:00	1:00	D
Rule	Cuba	1978	1990	-	Oct	Sun>=8	0:00	0	S
Rule	Cuba	1979	1980	-	Mar	Sun>=15	0:00	1:00	D
Rule	Cuba	1981	1985	-	May	Sun>=5	0:00	1:00	D
Rule	Cuba	1986	1989	-	Mar	Sun>=14	0:00	1:00	D
Rule	Cuba	1990	1997	-	Apr	Sun>=1	0:00	1:00	D
Rule	Cuba	1991	1995	-	Oct	Sun>=8	0:00s	0	S
Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
Rule	Cuba	2000	2006	-	Apr	Sun>=1	0:00s	1:00	D
Rule	Cuba	2006	only	-	Oct	lastSun	0:00s	0	S
Rule	Cuba	2007	max	-	Mar	Sun>=8	0:00s	1:00	D
Rule	Cuba	2007	max	-	Nov	Sun>=1	0:00s	0	S

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Havana	-5:29:28 -	LMT	1890
			-5:29:36 -	HMT	1925 Jul 19 12:00 # Havana MT
			-5:00	Cuba	C%sT

# Dominica
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Dominica	-4:05:36 -	LMT	1911 Jul 1 0:01		# Roseau
			-4:00	-	AST

# Dominican Republic

# From Steffen Thorsen (2000-10-30):
# Enrique Morales reported to me that the Dominican Republic has changed the
# time zone to Eastern Standard Time as of Sunday 29 at 2 am....
# http://www.listin.com.do/antes/261000/republica/princi.html

# From Paul Eggert (2000-12-04):
# That URL (2000-10-26, in Spanish) says they planned to use US-style DST.

# From Rives McDow (2000-12-01):
# Dominican Republic changed its mind and presidential decree on Tuesday,
# November 28, 2000, with a new decree.  On Sunday, December 3 at 1:00 AM the
# Dominican Republic will be reverting to 8 hours from the International Date
# Line, and will not be using DST in the foreseeable future.  The reason they
# decided to use DST was to be in synch with Puerto Rico, who was also going
# to implement DST.  When Puerto Rico didn't implement DST, the president
# decided to revert.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	DR	1966	only	-	Oct	30	0:00	1:00	D
Rule	DR	1967	only	-	Feb	28	0:00	0	S
Rule	DR	1969	1973	-	Oct	lastSun	0:00	0:30	HD
Rule	DR	1970	only	-	Feb	21	0:00	0	S
Rule	DR	1971	only	-	Jan	20	0:00	0	S
Rule	DR	1972	1974	-	Jan	21	0:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Santo_Domingo -4:39:36 -	LMT	1890
			-4:40	-	SDMT	1933 Apr  1 12:00 # S. Dom. MT
			-5:00	DR	E%sT	1974 Oct 27
			-4:00	-	AST	2000 Oct 29 02:00
			-5:00	US	E%sT	2000 Dec  3 01:00
			-4:00	-	AST

# El Salvador

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Salv	1987	1988	-	May	Sun>=1	0:00	1:00	D
Rule	Salv	1987	1988	-	Sep	lastSun	0:00	0	S
# There are too many San Salvadors elsewhere, so use America/El_Salvador
# instead of America/San_Salvador.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/El_Salvador -5:56:48 -	LMT	1921		# San Salvador
			-6:00	Salv	C%sT

# Grenada
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Grenada	-4:07:00 -	LMT	1911 Jul	# St George's
			-4:00	-	AST

# Guadeloupe
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Guadeloupe	-4:06:08 -	LMT	1911 Jun 8	# Pointe a Pitre
			-4:00	-	AST

# Guatemala
#
# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen:
# Diario Co Latino, at
# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079,
# says in an article dated 2006-04-19 that the Guatemalan government had
# decided on that date to advance official time by 60 minutes, to lessen the
# impact of the elevated cost of oil....  Daylight saving time will last from
# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified).
# From Paul Eggert (2006-06-22):
# The Ministry of Energy and Mines, press release CP-15/2006
# (2006-04-19), says DST ends at 24:00.  See
# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>.

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Guat	1973	only	-	Nov	25	0:00	1:00	D
Rule	Guat	1974	only	-	Feb	24	0:00	0	S
Rule	Guat	1983	only	-	May	21	0:00	1:00	D
Rule	Guat	1983	only	-	Sep	22	0:00	0	S
Rule	Guat	1991	only	-	Mar	23	0:00	1:00	D
Rule	Guat	1991	only	-	Sep	 7	0:00	0	S
Rule	Guat	2006	only	-	Apr	30	0:00	1:00	D
Rule	Guat	2006	only	-	Oct	 1	0:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Guatemala	-6:02:04 -	LMT	1918 Oct 5
			-6:00	Guat	C%sT

# Haiti
# From Gwillim Law (2005-04-15):
# Risto O. Nykanen wrote me that Haiti is now on DST.
# I searched for confirmation, and I found a
# <a href="http://www.haitianconsulate.org/time.doc"> press release
# on the Web page of the Haitian Consulate in Chicago (2005-03-31),
# </a>.  Translated from French, it says:
#
#  "The Prime Minister's Communication Office notifies the public in general
#   and the press in particular that, following a decision of the Interior
#   Ministry and the Territorial Collectivities [I suppose that means the
#   provinces], Haiti will move to Eastern Daylight Time in the night from next
#   Saturday the 2nd to Sunday the 3rd.
#
#  "Consequently, the Prime Minister's Communication Office wishes to inform
#   the population that the country's clocks will be set forward one hour
#   starting at midnight.  This provision will hold until the last Saturday in
#   October 2005.
#
#  "Port-au-Prince, March 31, 2005"
#
# From Steffen Thorsen (2006-04-04):
# I have been informed by users that Haiti observes DST this year like
# last year, so the current "only" rule for 2005 might be changed to a
# "max" rule or to last until 2006. (Who knows if they will observe DST
# next year or if they will extend their DST like US/Canada next year).
#
# I have found this article about it (in French):
# http://www.haitipressnetwork.com/news.cfm?articleID=7612
#
# The reason seems to be an energy crisis.


# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Haiti	1983	only	-	May	8	0:00	1:00	D
Rule	Haiti	1984	1987	-	Apr	lastSun	0:00	1:00	D
Rule	Haiti	1983	1987	-	Oct	lastSun	0:00	0	S
# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s.
# Go with IATA.
Rule	Haiti	1988	1997	-	Apr	Sun>=1	1:00s	1:00	D
Rule	Haiti	1988	1997	-	Oct	lastSun	1:00s	0	S
Rule	Haiti	2005	max	-	Apr	Sun>=1	0:00	1:00	D
Rule	Haiti	2005	max	-	Oct	lastSun	0:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Port-au-Prince -4:49:20 -	LMT	1890
			-4:49	-	PPMT	1917 Jan 24 12:00 # P-a-P MT
			-5:00	Haiti	E%sT

# Honduras
# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1.

# From Paul Eggert (2006-05-05):
# worldtimezone.com reports a 2006-05-02 Spanish-language AP article
# saying Honduras will start using DST midnight Saturday, effective 4
# months until September.  La Tribuna reported today
# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president
# of Honduras, refused to back down on this.

# From Jesper Norgaard Welen (2006-08-08):
# It seems that Honduras has returned from DST to standard time this Monday at
# 00:00 hours (prolonging Sunday to 25 hours duration).
# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html

# From Paul Eggert (2006-08-08):
# Also see Diario El Heraldo, The country returns to standard time (2006-08-08)
# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>.
# It mentions executive decree 18-2006.

# From Steffen Thorsen (2006-08-17):
# Honduras will observe DST from 2007 to 2009, exact dates are not
# published, I have located this authoritative source:
# http://www.presidencia.gob.hn/noticia.aspx?nId=47

# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Hond	1987	1988	-	May	Sun>=1	0:00	1:00	D
Rule	Hond	1987	1988	-	Sep	lastSun	0:00	0	S
Rule	Hond	2006	2009	-	May	Sun>=1	0:00	1:00	D
Rule	Hond	2006	2009	-	Aug	Mon>=1	0:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Tegucigalpa -5:48:52 -	LMT	1921 Apr
			-6:00	Hond	C%sT
#
# Great Swan I ceded by US to Honduras in 1972

# Jamaica

# From Bob Devine (1988-01-28):
# Follows US rules.

# From U. S. Naval Observatory (1989-01-19):
# JAMAICA             5 H  BEHIND UTC

# From Shanks & Pottenger:
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Jamaica	-5:07:12 -	LMT	1890		# Kingston
			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
			-5:00	-	EST	1974 Apr 28 2:00
			-5:00	US	E%sT	1984
			-5:00	-	EST

# Martinique
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Martinique	-4:04:20 -      LMT	1890		# Fort-de-France
			-4:04:20 -	FFMT	1911 May     # Fort-de-France MT
			-4:00	-	AST	1980 Apr  6
			-4:00	1:00	ADT	1980 Sep 28
			-4:00	-	AST

# Montserrat
# From Paul Eggert (2006-03-22):
# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital.
# world.gazetteer.com says Cork Hill is the most populous location now.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Montserrat	-4:08:52 -	LMT	1911 Jul 1 0:01   # Cork Hill
			-4:00	-	AST

# Nicaragua
#
# This uses Shanks & Pottenger for times before 2005.
#
# From Steffen Thorsen (2005-04-12):
# I've got reports from 8 different people that Nicaragua just started
# DST on Sunday 2005-04-10, in order to save energy because of
# expensive petroleum.  The exact end date for DST is not yet
# announced, only "September" but some sites also say "mid-September".
# Some background information is available on the President's official site:
# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm
# The Decree, no 23-2005 is available here:
# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf
#
# From Paul Eggert (2005-05-01):
# The decree doesn't say anything about daylight saving, but for now let's
# assume that it is daylight saving....
#
# From Gwillim Law (2005-04-21):
# The Associated Press story on the time change, which can be found at
# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html
# and elsewhere, says (fifth paragraph, translated from Spanish):  "The last
# time that a change of clocks was applied to save energy was in the year 2000
# during the Arnoldo Aleman administration."...
# The northamerica file says that Nicaragua has been on UTC-6 continuously
# since December 1998.  I wasn't able to find any details of Nicaraguan time
# changes in 2000.  Perhaps a note could be added to the northamerica file, to
# the effect that we have indirect evidence that DST was observed in 2000.
#
# From Jesper Norgaard Welen (2005-11-02):
# Nicaragua left DST the 2005-10-02 at 00:00 (local time).
# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm
# (2005-09-26)
#
# From Jesper Norgaard Welen (2006-05-05):
# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410
# (my informal translation)
# By order of the president of the republic, Enrique Bolanos, Nicaragua
# advanced by sixty minutes their official time, yesterday at 2 in the
# morning, and will stay that way until 30.th. of september.
#
# From Jesper Norgaard Welen (2006-09-30):
# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf
# My informal translation runs:
# The natural sun time is restored in all the national territory, in that the
# time is returned one hour at 01:00 am of October 1 of 2006.
#
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Nic	1979	1980	-	Mar	Sun>=16	0:00	1:00	D
Rule	Nic	1979	1980	-	Jun	Mon>=23	0:00	0	S
Rule	Nic	2005	only	-	Apr	10	0:00	1:00	D
Rule	Nic	2005	only	-	Oct	Sun>=1	0:00	0	S
Rule	Nic	2006	only	-	Apr	30	2:00	1:00	D
Rule	Nic	2006	only	-	Oct	Sun>=1	1:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Managua	-5:45:08 -	LMT	1890
			-5:45:12 -	MMT	1934 Jun 23 # Managua Mean Time?
			-6:00	-	CST	1973 May
			-5:00	-	EST	1975 Feb 16
			-6:00	Nic	C%sT	1992 Jan  1 4:00
			-5:00	-	EST	1992 Sep 24
			-6:00	-	CST	1993
			-5:00	-	EST	1997
			-6:00	Nic	C%sT

# Panama
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Panama	-5:18:08 -	LMT	1890
			-5:19:36 -	CMT	1908 Apr 22   # Colon Mean Time
			-5:00	-	EST

# Puerto Rico
# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Puerto_Rico -4:24:25 -	LMT	1899 Mar 28 12:00    # San Juan
			-4:00	-	AST	1942 May  3
			-4:00	US	A%sT	1946
			-4:00	-	AST

# St Kitts-Nevis
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/St_Kitts	-4:10:52 -	LMT	1912 Mar 2	# Basseterre
			-4:00	-	AST

# St Lucia
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/St_Lucia	-4:04:00 -	LMT	1890		# Castries
			-4:04:00 -	CMT	1912	    # Castries Mean Time
			-4:00	-	AST

# St Pierre and Miquelon
# There are too many St Pierres elsewhere, so we'll use `Miquelon'.
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Miquelon	-3:44:40 -	LMT	1911 May 15	# St Pierre
			-4:00	-	AST	1980 May
			-3:00	-	PMST	1987 # Pierre & Miquelon Time
			-3:00	Canada	PM%sT

# St Vincent and the Grenadines
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/St_Vincent	-4:04:56 -	LMT	1890		# Kingstown
			-4:04:56 -	KMT	1912	   # Kingstown Mean Time
			-4:00	-	AST

# Turks and Caicos
# From Paul Eggert (2006-03-22):
# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998)
# says they switch at midnight.  Go with IATA SSIM.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	TC	1979	1986	-	Apr	lastSun	0:00	1:00	D
Rule	TC	1979	max	-	Oct	lastSun	0:00	0	S
Rule	TC	1987	max	-	Apr	Sun>=1	0:00	1:00	D
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Grand_Turk	-4:44:32 -	LMT	1890
			-5:07:12 -	KMT	1912 Feb    # Kingston Mean Time
			-5:00	TC	E%sT

# British Virgin Is
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Tortola	-4:18:28 -	LMT	1911 Jul    # Road Town
			-4:00	-	AST

# Virgin Is
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/St_Thomas	-4:19:44 -	LMT	1911 Jul    # Charlotte Amalie
			-4:00	-	AST