Bug #12271: `Time#to_time` removes timezone information

• Status: Closed
• Assignee: -
• Target version: -
• ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290)
• Backport: 2.1: WONTFIX, 2.2: WONTFIX, 2.3: WONTFIX

[yui-knk (Kaneko Yuichiro)]

irb(main):001:0> RUBY_VERSION
=> "2.3.0"
irb(main):002:0> require 'date'
=> true
irb(main):003:0> ENV['TZ'] = 'US/Eastern'
=> "US/Eastern"
irb(main):004:0> time = Time.new(2005, 2, 21, 10, 11, 12, '+09:00')
=> 2005-02-21 10:11:12 +0900
irb(main):005:0> time.to_time
=> 2005-02-20 20:11:12 -0500

Same as https://bugs.ruby-lang.org/issues/12189, Time#to_time does not use self timezone.
I think it is better to make it to match with DateTime#to_time behavior.

[nobu (Nobuyoshi Nakada)]

• Status changed from Open to Closed

Applied in changeset r54553.

---

date_core.c: preserve timezone

• ext/date/date_core.c (time_to_time): should preserve timezone
  info. [ruby-core:74889] [Bug #12271]

[usa (Usaku NAKAMURA)]

• Backport changed from 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN to 2.1: WONTFIX, 2.2: REQUIRED, 2.3: REQUIRED

[yui-knk (Kaneko Yuichiro)]

I feel this is a like feature change.

For example, it seems a rubyist felt this change be incompatibility.
https://github.com/rails/rails/issues/24617

Do you think this change is bug fix?

[shyouhei (Shyouhei Urabe)]

(It is up to the branch maintainers but) given the actual Rails breakage, my feeling is negative to classify this as something to backport.

[usa (Usaku NAKAMURA)]

• Backport changed from 2.1: WONTFIX, 2.2: REQUIRED, 2.3: REQUIRED to 2.1: WONTFIX, 2.2: WONTFIX, 2.3: UNKNOWN

Thank you for reporting.
I give up to backport this into ruby_2_2.

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.1: WONTFIX, 2.2: WONTFIX, 2.3: UNKNOWN to 2.1: WONTFIX, 2.2: WONTFIX, 2.3: WONTFIX