Time::Zone(3) User Contributed Perl Documentation Time::Zone(3) NAME Time::Zone - miscellaneous timezone manipulations routines VERSION version 2.35 SYNOPSIS use Time::Zone; print tz2zone(); print tz2zone($ENV{'TZ'}); print tz2zone($ENV{'TZ'}, time()); my $isdst = 0; print tz2zone($ENV{'TZ'}, undef, $isdst); my $offset = tz_local_offset(); my $TZ = "EST"; $offset = tz_offset($TZ); DESCRIPTION This is a collection of miscellaneous timezone manipulation routines. tz2zone() parses the TZ environment variable and returns a timezone string suitable for inclusion in date(1)-like output. It optionally takes a timezone string, a time, and a is-dst flag. tz_local_offset() determines the offset from GMT time in seconds. It only does the calculation once. tz_offset() determines the offset from GMT in seconds of a specified timezone. tz_name() determines the name of the timezone based on its offset NAME Time::Zone -- miscellaneous timezone manipulations routines AUTHORS Graham Barr David Muir Sharnoff Paul Foley AUTHOR Graham COPYRIGHT AND LICENSE This software is copyright (c) 2020 by Graham Barr. This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself. perl v5.42.1 2026-03-22 Time::Zone(3)