localtime
localtime - convert UNIX time into record or string using local time
localtime EXPR
Converts a time as returned by the time function to a 9-element array
with the time analyzed for the local timezone.  Typically used as
follows:
    ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$isdst) =
                                                localtime(time);
All array elements are numeric, and come straight out of a struct tm.
In particular this means that $mon has the range 0..11 and $wday has
the range 0..6.  If EXPR is omitted, does localtime(time).
In a scalar context, prints out the ctime(3) value:
    $now_string = localtime;  # e.g. "Thu Oct 13 04:54:34 1994"
See also timelocal and the strftime(3) function available
via the POSIX modulie.