TZInfo

The TZInfo library uses the Olson database to allow developers to create applications that work with geographically-aware, real-life time and date values.

TZInfo can easily change from one time format to another, modify time values when switching time zones, and also adjust the time according to the time zone's DST settings.

All transformations are done using just Ruby code, with no third-party data files.

The TZInfo library has been included with the Ruby on Rails framework core since version 2.1 and higher.

What is new in this release:

• Fixed an error with duplicates being returned by Timezone#all_country_zones and Timezone#all_country_zone_identifiers when used with tzinfo-data v1.2014.6 or later.
• Use the zone1970.tab file for country timezone data if it is found in the zoneinfo directory (and fallback to zone.tab if not). zone1970.tab was added in tzdata 2014f. zone.tab is now deprecated.

What is new in version 1.1.0:

• Added a transitions_up_to method to Timezone that returns a list of the times where the UTC offset of the timezone changes.
• Added an offsets_up_to method to Timezone that returns the set of offsets that have been observed in a defined timezone.
• Fixed a "can't modify frozen String" error when loading a Timezone from a zoneinfo file using an identifier String that is both tainted and frozen. Resolves #3.
• Support TZif3 format zoneinfo files (now produced by zic from tzcode version 2013e onwards).
• Support using YARD to generate documentation (added a .yardopts file).
• Ignore the +VERSION file included in the zoneinfo directory on Mac OS X.
• Added a note to the documentation concerning 32-bit zoneinfo files (as included with Mac OS X).

What is new in version 0.3.39:

• Updated to tzdata version 2014a.

What is new in version 0.3.30:

• Updated to tzdata version 2011k.