# phpman > info > Time::Zone

Time::[Zone(3pm)](https://www.chedong.com/phpMan.php/man/Zone/3pm/markdown)       User Contributed Perl Documentation      Time::[Zone(3pm)](https://www.chedong.com/phpMan.php/man/Zone/3pm/markdown)

NAME
       [Time::Zone](https://www.chedong.com/phpMan.php/perldoc/Time%3A%3AZone/markdown) -- miscellaneous timezone manipulations routines

SYNOPSIS
               use [Time::Zone](https://www.chedong.com/phpMan.php/perldoc/Time%3A%3AZone/markdown);
               print tz2zone();
               print tz2zone($ENV{'TZ'});
               print tz2zone($ENV{'TZ'}, time());
               print tz2zone($ENV{'TZ'}, undef, $isdst);
               $offset = tz_local_offset();
               $offset = tz_offset($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)](https://www.chedong.com/phpMan.php/man/date/1/markdown)-like output.  It opionally
       takes a timezone string, a time, and a is-dst flag.

       "tz_local_offset()" determins 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

AUTHORS
       Graham Barr <<gbarr@pobox.com>> David Muir Sharnoff <<muir@idiom.com>> Paul
       Foley <<paul@ascent.com>>

perl v5.32.1                      2021-02-15                   Time::[Zone(3pm)](https://www.chedong.com/phpMan.php/man/Zone/3pm/markdown)