The DateTime::TimeZone modules provide a Perl interface to the Olson time zone database. Rather than using the database directly, the library provides a set of modules, one for each time zone defined. This allows for various optimizations in doing time zone calculations. . The Olson time zone database is the best available source for world wide time zone information. It is available from ftp://elsie.nci.nih.gov/pub/. A good starting point for information on the database, and time zones in general, is http://www.twinsun.com/tz/tz-link.htm.
