From: "nobu (Nobuyoshi Nakada)" <nobu@...>
Date: 2013-10-19T04:27:37+09:00
Subject: [ruby-core:57935] [ruby-trunk - Bug #9032][Third Party's Issue]	Time.round reverts the DST status of the time


Issue #9032 has been updated by nobu (Nobuyoshi Nakada).

Status changed from Feedback to Third Party's Issue

It's not Time class object, but ActiveSupport::TimeWithZone.

It seems handling local time and time zone separately, so it is impossible to resolve the timezone from local time only, because 02:30:00 will come twice in at 2013-10-27, CEST and CET.

This is a miss-design of ActiveSupport::TimeWithZone.
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Bug #9032: Time.round reverts the DST status of the time
https://bugs.ruby-lang.org/issues/9032#change-42515

Author: mayanks (Mayank Sharma)
Status: Third Party's Issue
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-darwin11.4.2]
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


=begin
If the time is in non-DST and round method is applied, then the resulting time goes back to DST time. This happens only during the 1 hour when time goes back. Following example should explain the situation better.

 2.0.0-p0 :057 > d
 => Sun, 27 Oct 2013 02:30:00 CET +01:00
 2.0.0-p0 :058 > d.isdst
 => false
 2.0.0-p0 :059 > d.round(3)
 => Sun, 27 Oct 2013 02:30:00 CEST +02:00
 2.0.0-p0 :060 > d.round(3).isdst
 => true

I have set the priority Urgent as the DST is going to elapse in 10 days from now.
=end



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