=over

=item gmtime EXPR
X<gmtime> X<UTC> X<Greenwich>

=item gmtime

Converts a time as returned by the time function to an 9-element list
with the time localized for the standard Greenwich time zone.
Typically used as follows:

    #  0    1    2     3     4    5     6     7     8
    ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
					    gmtime(time);

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 C<0..11> with 0 indicating January and 11
indicating December.  $year is the number of years since 1900.  That
is, $year is C<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 C<0..364> (or C<0..365> in leap years).  $isdst
is always C<0>.

Note that the $year element is I<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, C<gmtime()> uses the current time (C<gmtime(time)>).

In scalar context, C<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 L</localtime> builtin. 
See also the C<timegm> function provided by the C<Time::Local> module,
and the strftime(3) and mktime(3) functions available via the L<POSIX> module.

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

See L<perlport/gmtime> for portability concerns.

=back