Version 0.1.0 of TZInfo has been released (based on version 2005n of the underlying tz data).

Major changes in this release include some significant performance improvements and support for handling ambiguity when converting from local times to UTC.

The full list of changes in this release:

* period_for_local and local_to_utc now allow resolution of ambiguous
times (e.g. when switching from daylight savings to standard time).
The behaviour of these methods when faced with an ambiguous local time
has now changed. If you are using these methods you should check
the documentation. Thanks to Cliff Matthews for suggesting this change.
* Added require 'date' to timezone.rb (date isn't loaded by default in all
environments).
* Use rake to build packages and documentation.
* License file is now included in gem distribution.
* Dates in definitions stored as Astronomical Julian Day numbers rather than
as civil dates (improves performance creating DateTime instances).
* Added options to TZDataParser to allow generation of specific zones and
countries.
* Moved TimezonePeriod class to timezone_period.rb.
* New TimezonePeriodList class to store TimezonePeriods for a timezone and
perform searches for periods.
* Timezones are now defined using blocks. TimezonePeriods are only instantiated
when they are needed. Thanks to Jamis Buck for the suggestion.
* Add options to TZDataParser to allow exclusion of specific zones and
countries.
* Exclude the Riyadh Solar Time zones. The rules are only for 1987 to 1989 and
take a long time to generate and process. Riyadh Solar Time is no longer
observed.
* The last TimezonePeriod for each Timezone is now written out with an
unbounded rather than arbitrary end time.
* Construct the Rational offset in TimezonePeriod once when the TimezonePeriod
is constructed rather than each time it is needed.
* Timezone and Country now keep a cache of loaded instances to avoid running
require which can be slow on some platforms.
* Updated to tzdata version 2005n.

GEM, zip and tar.gz files can be found at http://rubyforge.org/frs/?group_id=894. You can use 'gem update' to upgrade if you already tzinfo installed.