I downloaded version 0.3.12 of TZInfo from , and observed that it has a very robust set of timezones including, for example, 'America/ Anchorage':
irb(main):001:0> require 'rubygems' => false irb(main):002:0> require 'tzinfo' => true irb(main):003:0> TZInfo::Timezone.get('America/Anchorage') => #<TZInfo::DataTimezone: America/Anchorage>
Within Rails 2.2, however, which appears to have the same version of the gem (see the error that follows), the set of timezones is far more limited.
irb(main):001:0> require 'rubygems' => true irb(main):002:0> require 'active_support' => true irb(main):003:0> TZInfo::Timezone.get('America/Anchorage') TZInfo::InvalidTimezoneIdentifier: no such file to load -- tzinfo/ definitions/America/Anchorage from /usr/local/lib/ruby/gems/gems/activesupport-2.2.2/lib/ active_support/vendor/tzinfo-0.3.12/tzinfo/timezone.rb:108:in `get' from (irb):3
Perhaps the maintainers of TZInfo didn't bump up the version number of the gem after adding additional timezone data?