Sourced from tzinfo's releases.

v2.0.5

• Changed DateTime results to always use the proleptic Gregorian calendar. This affects DateTime results prior to 1582-10-15 and any arithmetic performed on the results that would produce a secondary result prior to 1582-10-15.
• Added support for eager loading all the time zone and country data by calling either TZInfo::DataSource#eager_load! or TZInfo.eager_load!. Compatible with Ruby On Rails' eager_load_namespaces. #129.
• Ignore the SECURITY file from Arch Linux's tzdata package. #134.

TZInfo v2.0.5 on RubyGems.org

v2.0.4

• Fixed an incorrect InvalidTimezoneIdentifier exception raised when loading a zoneinfo file that includes rules specifying an additional transition to the final defined offset (for example, Africa/Casablanca in version 2018e of the Time Zone Database). #123.

TZInfo v2.0.4 on RubyGems.org

v2.0.3

• Added support for handling "slim" format zoneinfo files that are produced by default by zic version 2020b and later. The POSIX-style TZ string is now used calculate DST transition times after the final defined transition in the file. #120.
• Fixed TimeWithOffset#getlocal returning a TimeWithOffset with the timezone_offset still assigned when called with an offset argument on JRuby 9.3.
• Rubinius is no longer supported.

TZInfo v2.0.3 on RubyGems.org

v2.0.2

• Fixed 'wrong number of arguments' errors when running on JRuby 9.0. #114.
• Fixed warnings when running on Ruby 2.8. #113.

TZInfo v2.0.2 on RubyGems.org

v2.0.1

• Fixed "SecurityError: Insecure operation - require" exceptions when loading data with recent Ruby releases in safe mode. #100.
• Fixed warnings when running on Ruby 2.7. #109.
• Added a TZInfo::Timezone#=~ method that performs a regex match on the time zone identifier. #99.
• Added a TZInfo::Country#=~ method that performs a regex match on the country code.

TZInfo v2.0.1 on RubyGems.org

v2.0.0

Added

• to_local and period_for instance methods have been added to TZInfo::Timezone. These are similar to utc_to_local and period_for_utc, but take the UTC offset of the given time into account.
• abbreviation, dst?, base_utc_offset and observed_utc_offset instance methods have been added to TZInfo::Timezone, returning the abbreviation, whether daylight savings time is in effect and the UTC offset of the time zone at a specified time.
• A TZInfo::Timestamp class has been added. It can be used with TZInfo::Timezone in place of a Time or DateTime.
• local_time, local_datetime and local_timestamp instance methods have been added to TZInfo::Timezone. These methods construct local Time, DateTime and TZInfo::Timestamp instances with the correct UTC offset and abbreviation for the time zone.
• Support for a (yet to be released) version 2 of tzinfo-data has been added, in addition to support for version 1. The new version will remove the (no longer needed) DateTime parameters from transition times, reduce memory consumption and improve the efficiency of loading timezone and country indexes.
• A TZInfo::VERSION constant has been added, indicating the TZInfo version number.

Changed

• The minimum supported Ruby versions are now Ruby MRI 1.9.3, JRuby 1.7 (in 1.9 or later mode) and Rubinius 3.
• Local times are now returned using the correct UTC offset (instead of using UTC). #49 and #52.
• Local times are returned as instances of TimeWithOffset, DateTimeWithOffset or TZInfo::TimestampWithOffset. These classes subclass Time, DateTime and TZInfo::Timestamp respectively. They override the default behaviour of the base classes to return information about the observed offset at the indicated time. For example, the zone abbreviation is returned when using the %Z directive with strftime.
• The transitions_up_to, offsets_up_to and strftime instance methods of TZInfo::Timezone now take the UTC offsets of given times into account (instead of ignoring them as was previously the case).
• The TZInfo::TimezonePeriod class has been split into two subclasses: TZInfo::OffsetTimezonePeriod and TZInfo::TransitionsTimezonePeriod. TZInfo::OffsetTimezonePeriod is returned for time zones that only have a single offset. TZInfo::TransitionsTimezonePeriod is returned for periods that start or end with a transition.

... (truncated)

Sourced from tzinfo's changelog.

Version 2.0.5 - 19-Jul-2022

• Changed DateTime results to always use the proleptic Gregorian calendar. This affects DateTime results prior to 1582-10-15 and any arithmetic performed on the results that would produce a secondary result prior to 1582-10-15.
• Added support for eager loading all the time zone and country data by calling either TZInfo::DataSource#eager_load! or TZInfo.eager_load!. Compatible with Ruby On Rails' eager_load_namespaces. #129.
• Ignore the SECURITY file from Arch Linux's tzdata package. #134.

Version 2.0.4 - 16-Dec-2020

• Fixed an incorrect InvalidTimezoneIdentifier exception raised when loading a zoneinfo file that includes rules specifying an additional transition to the final defined offset (for example, Africa/Casablanca in version 2018e of the Time Zone Database). #123.

Version 2.0.3 - 8-Nov-2020

• Added support for handling "slim" format zoneinfo files that are produced by default by zic version 2020b and later. The POSIX-style TZ string is now used calculate DST transition times after the final defined transition in the file. #120.
• Fixed TimeWithOffset#getlocal returning a TimeWithOffset with the timezone_offset still assigned when called with an offset argument on JRuby 9.3.
• Rubinius is no longer supported.

Version 2.0.2 - 2-Apr-2020

• Fixed 'wrong number of arguments' errors when running on JRuby 9.0. #114.
• Fixed warnings when running on Ruby 2.8. #113.

Version 2.0.1 - 24-Dec-2019

• Fixed "SecurityError: Insecure operation - require" exceptions when loading data with recent Ruby releases in safe mode. #100.
• Fixed warnings when running on Ruby 2.7. #109.
• Added a TZInfo::Timezone#=~ method that performs a regex match on the time zone identifier. #99.
• Added a TZInfo::Country#=~ method that performs a regex match on the country code.

Version 2.0.0 - 26-Dec-2018

... (truncated)

• d9b289e Preparing v2.0.5.
• 264c763 Add v0.3.61 and v1.2.10 from the 0.3 and 1.2 branches.
• ca29f34 Fix relative path loading tests.
• c4f177c Add a top level eager_load! method for Rails compatibility.
• 94be919 Support preloading all data from a DataSource.
• fe7ad26 Clarify that both files and directories are excluded.
• d2883cf Tidy up of security file ignoring.
• 6a4766e Merge pull request #133.
• 5d53b59 Workaround for 'Permission denied - NUL' errors with JRuby on Windows.
• 83450a1 ignore SECURITY file for Arch tzdata package
• Additional commits viewable in compare view

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