Sunday, December 15, 2013

C standard (1989 version) for Date format

The following is a list of all the format codes that the C standard (1989 version) requires, and these work on all platforms with a standard C implementation. Note that the 1999 version of the C standard added additional format codes.
The exact range of years for which works also varies across platforms. Regardless of platform, years before 1900 cannot be used.

the directive, you can in other environment as well.

Directive Meaning Example Notes
%a Weekday as locale’s abbreviated name.
Sun, Mon, ..., Sat (en_US);
So, Mo, ..., Sa (de_DE)
(1)
%A Weekday as locale’s full name.
Sunday, Monday, ..., Saturday (en_US);
Sonntag, Montag, ..., Samstag (de_DE)
(1)
%w Weekday as a decimal number, where 0 is Sunday and 6 is Saturday. 0, 1, ..., 6
%d Day of the month as a zero-padded decimal number. 01, 02, ..., 31
%b Month as locale’s abbreviated name.
Jan, Feb, ..., Dec (en_US);
Jan, Feb, ..., Dez (de_DE)
(1)
%B Month as locale’s full name.
January, February, ..., December (en_US);
Januar, Februar, ..., Dezember (de_DE)
(1)
%m Month as a zero-padded decimal number. 01, 02, ..., 12
%y Year without century as a zero-padded decimal number. 00, 01, ..., 99
%Y Year with century as a decimal number. 1970, 1988, 2001, 2013
%H Hour (24-hour clock) as a zero-padded decimal number. 00, 01, ..., 23
%I Hour (12-hour clock) as a zero-padded decimal number. 01, 02, ..., 12
%p Locale’s equivalent of either AM or PM.
AM, PM (en_US);
am, pm (de_DE)
(1), (2)
%M Minute as a zero-padded decimal number. 00, 01, ..., 59
%S Second as a zero-padded decimal number. 00, 01, ..., 59 (3)
%f Microsecond as a decimal number, zero-padded on the left. 000000, 000001, ..., 999999 (4)
%z UTC offset in the form +HHMM or -HHMM (empty string if the the object is naive). (empty), +0000, -0400, +1030 (5)
%Z Time zone name (empty string if the object is naive). (empty), UTC, EST, CST
%j Day of the year as a zero-padded decimal number. 001, 002, ..., 366
%U Week number of the year (Sunday as the first day of the week) as a zero padded decimal number. All days in a new year preceding the first Sunday are considered to be in week 0. 00, 01, ..., 53 (6)
%W Week number of the year (Monday as the first day of the week) as a decimal number. All days in a new year preceding the first Monday are considered to be in week 0. 00, 01, ..., 53 (6)
%c Locale’s appropriate date and time representation.
Tue Aug 16 21:30:00 1988 (en_US);
Di 16 Aug 21:30:00 1988 (de_DE)
(1)
%x Locale’s appropriate date representation.
08/16/88 (None);
08/16/1988 (en_US);
16.08.1988 (de_DE)
(1)
%X Locale’s appropriate time representation.
21:30:00 (en_US);
21:30:00 (de_DE)
(1)
%% A literal '%' character. %

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