libdatetime-timezone-perl 1:0.90-1+2009g (i386 binary) in ubuntu karmic

 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.