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-rw-r--r--manual/time.texi45
1 files changed, 23 insertions, 22 deletions
diff --git a/manual/time.texi b/manual/time.texi
index eb5a361..e16a729 100644
--- a/manual/time.texi
+++ b/manual/time.texi
@@ -1143,7 +1143,8 @@ the result is written right adjusted and space padded to the given
size.
An optional modifier can follow the optional flag and width
-specification. The modifiers, which are POSIX.2 extensions, are:
+specification. The modifiers, which were first standardized by
+POSIX.2-1992 and by @w{ISO C99}, are:
@table @code
@item E
@@ -1185,7 +1186,7 @@ The preferred calendar time representation for the current locale.
The century of the year. This is equivalent to the greatest integer not
greater than the year divided by 100.
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %d
The day of the month as a decimal number (range @code{01} through @code{31}).
@@ -1193,19 +1194,19 @@ The day of the month as a decimal number (range @code{01} through @code{31}).
@item %D
The date using the format @code{%m/%d/%y}.
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %e
The day of the month like with @code{%d}, but padded with blank (range
@code{ 1} through @code{31}).
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %F
The date using the format @code{%Y-%m-%d}. This is the form specified
in the @w{ISO 8601} standard and is the preferred form for all uses.
-This format is a @w{ISO C99} extension.
+This format was first standardized by @w{ISO C99} and by POSIX.1-2001.
@item %g
The year corresponding to the ISO week number, but without the century
@@ -1213,7 +1214,7 @@ The year corresponding to the ISO week number, but without the century
as @code{%y}, except that if the ISO week number (see @code{%V}) belongs
to the previous or next year, that year is used instead.
-This format was introduced in @w{ISO C99}.
+This format was first standardized by @w{ISO C99} and by POSIX.1-2001.
@item %G
The year corresponding to the ISO week number. This has the same format
@@ -1221,14 +1222,14 @@ and value as @code{%Y}, except that if the ISO week number (see
@code{%V}) belongs to the previous or next year, that year is used
instead.
-This format was introduced in @w{ISO C99} but was previously available
-as a GNU extension.
+This format was first standardized by @w{ISO C99} and by POSIX.1-2001
+but was previously available as a GNU extension.
@item %h
The abbreviated month name according to the current locale. The action
is the same as for @code{%b}.
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %H
The hour as a decimal number, using a 24-hour clock (range @code{00} through
@@ -1262,7 +1263,7 @@ The minute as a decimal number (range @code{00} through @code{59}).
@item %n
A single @samp{\n} (newline) character.
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %p
Either @samp{AM} or @samp{PM}, according to the given time value; or the
@@ -1278,19 +1279,19 @@ Either @samp{am} or @samp{pm}, according to the given time value; or the
corresponding strings for the current locale, printed in lowercase
characters. Noon is treated as @samp{pm} and midnight as @samp{am}.
-This format was introduced in @w{ISO C99} but was previously available
-as a GNU extension.
+This format is a GNU extension.
@item %r
The complete calendar time using the AM/PM format of the current locale.
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
+In the POSIX locale, this format is equivalent to @code{%I:%M:%S %p}.
@item %R
The hour and minute in decimal numbers using the format @code{%H:%M}.
-This format was introduced in @w{ISO C99} but was previously available
-as a GNU extension.
+This format was first standardized by @w{ISO C99} and by POSIX.1-2001
+but was previously available as a GNU extension.
@item %s
The number of seconds since the epoch, i.e., since 1970-01-01 00:00:00 UTC.
@@ -1304,18 +1305,18 @@ The seconds as a decimal number (range @code{00} through @code{60}).
@item %t
A single @samp{\t} (tabulator) character.
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %T
The time of day using decimal numbers using the format @code{%H:%M:%S}.
-This format is a POSIX.2 extension.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %u
The day of the week as a decimal number (range @code{1} through
@code{7}), Monday being @code{1}.
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %U
The week number of the current year as a decimal number (range @code{00}
@@ -1334,7 +1335,7 @@ The week before week @code{01} of a year is the last week (@code{52} or
@code{53}) of the previous year even if it contains days from the new
year.
-This format is a POSIX.2 extension and also appears in @w{ISO C99}.
+This format was first standardized by POSIX.2-1992 and by @w{ISO C99}.
@item %w
The day of the week as a decimal number (range @code{0} through
@@ -1365,10 +1366,10 @@ before the year @code{1} are numbered @code{0}, @code{-1}, and so on.
@code{-0600} or @code{+0100}), or nothing if no time zone is
determinable.
-This format was introduced in @w{ISO C99} but was previously available
-as a GNU extension.
+This format was first standardized by @w{ISO C99} and by POSIX.1-2001
+but was previously available as a GNU extension.
-A full @w{RFC 822} timestamp is generated by the format
+In the POSIX locale, a full @w{RFC 822} timestamp is generated by the format
@w{@samp{"%a, %d %b %Y %H:%M:%S %z"}} (or the equivalent
@w{@samp{"%a, %d %b %Y %T %z"}}).