The CHANGES file for DateTime-TimeZone-0.37 indicates that both versions 0.36 (2005-04-21) and 0.37 (2005-08-22) were based on version 2005i of the Olson tz database. This implies that 2005i or thereabouts was the first version of the tz database to incorporate the planned 2007 North American Daylight Saving Time changes. It also means that DateTime has been DST2007-ready since early 2005.

The current version of DateTime::TimeZone is 0.57 (2006-11-27), which is based on version 2006p of the tz database (the current version). In general, it's probably a Good Idea to frequently update DT::TZ and, thereby, the underlying Perl implementation of the Olson tz database. There's also a utility named parse_olson in the tools/ directory of the DT::TZ distribution for generating the Perl modules from the tz database files without having to upgrade DT::TZ itself.

Jim

In reply to Re^2: Impact of U.S. Daylight Savings Time changes in 2007 on Perl distribution/code by Jim
in thread Impact of U.S. Daylight Savings Time changes in 2007 on Perl distribution/code by kool_delhite

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