Synopsis

size_t strftime(char *s,
                size_t smax,
                const char *fmt,
                const tm *tp);

Description

strftime formats the *tp struct to a null terminated string of maximum size smax-1 into the array at *s based on the fmt format string. The format string consists of conversion specifications and ordinary characters. Conversion specifications start with a % character followed by an optional # character. The following conversion specifications are supported:

Specification	Description
%a	Abbreviated weekday name
%A	Full weekday name
%b	Abbreviated month name
%B	Full month name
%c	Date and time representation appropriate for locale
%#c	Date and time formatted as "%A, %B %#d, %Y, %H:%M:%S" (Microsoft extension)
%C	Century number
%d	Day of month as a decimal number [01,31]
%#d	Day of month without leading zero [1,31]
%D	Date in the form %m/%d/%y (POSIX.1-2008 extension)
%e	Day of month [ 1,31], single digit preceded by space
%F	Date in the format %Y-%m-%d
%h	Abbreviated month name as %b
%H	Hour in 24-hour format [00,23]
%#H	Hour in 24-hour format without leading zeros [0,23]
%I	Hour in 12-hour format [01,12]
%#I	Hour in 12-hour format without leading zeros [1,12]
%j	Day of year as a decimal number [001,366]
%#j	Day of year as a decimal number without leading zeros [1,366]
%k	Hour in 24-hour clock format [ 0,23] (POSIX.1-2008 extension)
%l	Hour in 12-hour clock format [ 0,12] (POSIX.1-2008 extension)
%m	Month as a decimal number [01,12]
%#m	Month as a decimal number without leading zeros [1,12]
%M	Minute as a decimal number [00,59]
%#M	Minute as a decimal number without leading zeros [0,59]
%n	Insert newline character (POSIX.1-2008 extension)
%p	Locale's a.m or p.m indicator for 12-hour clock
%r	Time as %I:%M:%s %p (POSIX.1-2008 extension)
%R	Time as %H:%M (POSIX.1-2008 extension)
%S	Second as a decimal number [00,59]
%t	Insert tab character (POSIX.1-2008 extension)
%T	Time as %H:%M:%S
%#S	Second as a decimal number without leading zeros [0,59]
%U	Week of year as a decimal number [00,53], Sunday is first day of the week
%#U	Week of year as a decimal number without leading zeros [0,53], Sunday is first day of the week
%w	Weekday as a decimal number [0,6], Sunday is 0
%W	Week number as a decimal number [00,53], Monday is first day of the week
%#W	Week number as a decimal number without leading zeros [0,53], Monday is first day of the week
%x	Locale's date representation
%#x	Locale's long date representation
%X	Locale's time representation
%y	Year without century, as a decimal number [00,99]
%#y	Year without century, as a decimal number without leading zeros [0,99]
%Y	Year with century, as decimal number
%z,%Z	Timezone name or abbreviation
%%	%