.\" Copyright (c) 1989 The Regents of the University of California.
.\" %sccs.include.redist.man%
.\" @(#)strftime.3 5.9 (Berkeley) %G%
strftime \- format date and time
strftime(char *s, size_t maxsize, const char *format,
const struct tm *timeptr);
function formats the information from
according to the string pointed to by
string consists of zero or more conversion specifications and
All ordinary characters are copied directly into the buffer.
A conversion specification consists of a percent sign (``%'')
characters will be placed into the array.
If the total number of resulting characters, including the terminating
null character, is not more than
returns the number of characters in the array, not counting the
Otherwise, zero is returned.
Each conversion specification is replaced by the characters as
follows which are then copied into the buffer.
is replaced by the full weekday name.
is replaced by the abbreviated weekday name, where the abbreviation
is the first three characters.
is replaced by the full month name.
is replaced by the abbreviated month name, where the abbreviation is
the first three characters.
is equivalent to ``%a %b %e %H:%M:%S %Y'' (the format produced by
is equivalent to ``%m/%d/%y''.
is replaced by the date in the format ``mm/dd/yy''.
is replaced by the day of the month as a decimal number (01-31).
is replaced by the day of month as a decimal number (1-31); single
digits are preceded by a blank.
is replaced by the hour (24-hour clock) as a decimal number (00-23).
is replaced by the hour (12-hour clock) as a decimal number (01-12).
is replaced by the day of the year as a decimal number (001-366).
is replaced by the hour (24-hour clock) as a decimal number (0-23);
single digits are preceded by a blank.
is replaced by the hour (12-hour clock) as a decimal number (1-12);
single digits are preceded by a blank.
is replaced by the minute as a decimal number (00-59).
is replaced by the month as a decimal number (01-12).
is replaced by a newline.
is replaced by either ``AM'' or ``PM'' as appropriate.
is equivalent to ``%H:%M''.
is equivalent to ``%I:%M:%S %p''.
is replaced by the second as a decimal number (00-60).
is replaced by the number of seconds since the Epoch, UCT (see
is equivalent to ``%H:%M:%S''.
is replaced by the week number of the year (Sunday as the first day of
the week) as a decimal number (00-53).
is replaced by the week number of the year (Monday as the first day of
the week) as a decimal number (00-53).
is replaced by the weekday (Sunday as the first day of the week)
as a decimal number (0-6).
is equivalent to ``%m/%d/%y %H:%M:%S''.
is replaced by the year with century as a decimal number.
is replaced by the year without century as a decimal number (00-99).
is replaced by the time zone name.
date(1), ctime(3), printf(1), printf(3)
There is no conversion specification for the phase of the moon.
conforms to ANSI X3.159-1989 (``ANSI C'').
The ``%s'' conversion specification is an extension.