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gmtime EXPR

Converts a time as returned by the time function to an 8-element list with the time localized for the standard Greenwich time zone. Typically used as follows:

#  0    1    2     3     4    5     6     7
($sec,$min,$hour,$mday,$mon,$year,$wday,$yday) =

All list elements are numeric, and come straight out of the C `struct tm'. $sec, $min, and $hour are the seconds, minutes, and hours of the specified time. $mday is the day of the month, and $mon is the month itself, in the range 0..11 with 0 indicating January and 11 indicating December. $year is the number of years since 1900. That is, $year is 123 in year 2023. $wday is the day of the week, with 0 indicating Sunday and 3 indicating Wednesday. $yday is the day of the year, in the range 0..364 (or 0..365 in leap years.)

Note that the $year element is not simply the last two digits of the year. If you assume it is, then you create non-Y2K-compliant programs--and you wouldn't want to do that, would you?

The proper way to get a complete 4-digit year is simply:

$year += 1900;

And to get the last two digits of the year (e.g., '01' in 2001) do:

$year = sprintf("%02d", $year % 100);

If EXPR is omitted, gmtime() uses the current time (gmtime(time)).

In scalar context, gmtime() returns the ctime(3) value:

$now_string = gmtime;  # e.g., "Thu Oct 13 04:54:34 1994"

If you need local time instead of GMT use the "localtime" builtin. See also the timegm function provided by the Time::Local module, and the strftime(3) and mktime(3) functions available via the POSIX module.

This scalar value is not locale dependent (see perllocale), but is instead a Perl builtin. To get somewhat similar but locale dependent date strings, see the example in "localtime".