[ruby-core:74889] [Ruby trunk Bug#12271] `Time#to_time` removes timezone information

Issue #12271 has been reported by Kaneko Yuichiro.

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Bug #12271: `Time#to_time` removes timezone information
https://bugs.ruby-lang.org/issues/12271

* Author: Kaneko Yuichiro
* Status: Open
* Priority: Normal
* Assignee: 
* ruby -v: ruby 2.3.0p0 (2015-12-25 revision 53290) 
* Backport: 2.1: UNKNOWN, 2.2: UNKNOWN, 2.3: UNKNOWN
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```ruby
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.

---Files--------------------------------
time.diff (1.35 KB)


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