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-rw-r--r--manual/locale.texi26
-rw-r--r--manual/time.texi35
2 files changed, 50 insertions, 11 deletions
diff --git a/manual/locale.texi b/manual/locale.texi
index 60ad2a1e40..059db75c1c 100644
--- a/manual/locale.texi
+++ b/manual/locale.texi
@@ -923,7 +923,7 @@ corresponds to Sunday.
@itemx DAY_5
@itemx DAY_6
@itemx DAY_7
-Similar to @code{ABDAY_1} etc., but here the return value is the
+Similar to @code{ABDAY_1} etc.,@: but here the return value is the
unabbreviated weekday name.
@item ABMON_1
@itemx ABMON_2
@@ -937,7 +937,8 @@ unabbreviated weekday name.
@itemx ABMON_10
@itemx ABMON_11
@itemx ABMON_12
-The return value is abbreviated name of the month. @code{ABMON_1}
+The return value is the abbreviated name of the month, in the grammatical
+form used when the month forms part of a complete date. @code{ABMON_1}
corresponds to January.
@item MON_1
@itemx MON_2
@@ -951,8 +952,27 @@ corresponds to January.
@itemx MON_10
@itemx MON_11
@itemx MON_12
-Similar to @code{ABMON_1} etc., but here the month names are not abbreviated.
+Similar to @code{ABMON_1} etc.,@: but here the month names are not abbreviated.
Here the first value @code{MON_1} also corresponds to January.
+@item ALTMON_1
+@itemx ALTMON_2
+@itemx ALTMON_3
+@itemx ALTMON_4
+@itemx ALTMON_5
+@itemx ALTMON_6
+@itemx ALTMON_7
+@itemx ALTMON_8
+@itemx ALTMON_9
+@itemx ALTMON_10
+@itemx ALTMON_11
+@itemx ALTMON_12
+Similar to @code{MON_1} etc.,@: but here the month names are in the grammatical
+form used when the month is named by itself. The @code{strftime} functions
+use these month names for the format specifier @code{OB}.
+
+Note that not all languages need two different forms of the month names,
+so the strings returned for @code{MON_@dots{}} and @code{ALTMON_@dots{}}
+may or may not be the same, depending on the locale.
@item AM_STR
@itemx PM_STR
The return values are strings which can be used in the representation of time
diff --git a/manual/time.texi b/manual/time.texi
index 33aa221428..2a5afd9e56 100644
--- a/manual/time.texi
+++ b/manual/time.texi
@@ -1346,8 +1346,13 @@ example, @code{%Ex} might yield a date format based on the Japanese
Emperors' reigns.
@item O
-Use the locale's alternate numeric symbols for numbers. This modifier
-applies only to numeric format specifiers.
+With all format specifiers that produce numbers: use the locale's
+alternate numeric symbols.
+
+With @code{%B} and @code{%b}: use the grammatical form for month names
+that is appropriate when the month is named by itself, rather than
+the form that is appropriate when the month is used as part of a
+complete date. This is a GNU extension.
@end table
If the format supports the modifier but no alternate representation
@@ -1365,13 +1370,21 @@ The abbreviated weekday name according to the current locale.
The full weekday name according to the current locale.
@item %b
-The abbreviated month name according to the current locale.
+The abbreviated month name according to the current locale, in the
+grammatical form used when the month is part of a complete date.
+As a GNU extension, the @code{O} modifier can be used (@code{%Ob})
+to get the grammatical form used when the month is named by itself.
@item %B
-The full month name according to the current locale.
+The full month name according to the current locale, in the
+grammatical form used when the month is part of a complete date.
+As a GNU extension, the @code{O} modifier can be used (@code{%OB})
+to get the grammatical form used when the month is named by itself.
-Using @code{%B} together with @code{%d} produces grammatically
-incorrect results for some locales.
+Note that not all languages need two different forms of the month
+names, so the text produced by @code{%B} and @code{%OB}, and by
+@code{%b} and @code{%Ob}, may or may not be the same, depending on
+the locale.
@item %c
The preferred calendar time representation for the current locale.
@@ -1778,8 +1791,14 @@ the full name.
@item %b
@itemx %B
@itemx %h
-The month name according to the current locale, in abbreviated form or
-the full name.
+A month name according to the current locale. All three specifiers
+will recognize both abbreviated and full month names. If the
+locale provides two different grammatical forms of month names,
+all three specifiers will recognize both forms.
+
+As a GNU extension, the @code{O} modifier can be used with these
+specifiers; it has no effect, as both grammatical forms of month
+names are recognized.
@item %c
The date and time representation for the current locale.