Perl 5 version 8.7 documentation
- 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:
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..11with 0 indicating January and 11 indicating December. $year is the number of years since 1900. That is, $year is
123in 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..365in 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);
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
timegmfunction provided by the
Time::Localmodule, and the strftime(3) and mktime(3) functions available via the POSIX module.
See gmtime in perlport for portability concerns.