[ruby-core:68785] [Ruby trunk - Bug #11042] [Open] Timezone boundary is different between versions 2.2.0 and 2.2.1

Issue #11042 has been reported by Peter Yates.

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Bug #11042: Timezone boundary is different between versions 2.2.0 and 2.2.1
https://bugs.ruby-lang.org/issues/11042

* Author: Peter Yates
* Status: Open
* Priority: Normal
* Assignee:=20
* ruby -v: 2.2.1
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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In Ruby 2.2.1 the timezone boundary for BST->GMT in the UK appears to be at=
 1am:

~~~
[1] pry ~ =C2=BB  Time.new(2013, 10, 27, 0, 59).localtime.dst?
true
[2] pry ~ =C2=BB  Time.new(2013, 10, 27, 1, 0).localtime.dst?
false
~~~

In Ruby 2.2.0 it is at 2am:

~~~
[1] pry ~ =C2=BB  Time.new(2013, 10, 27, 1, 59).localtime.dst?
true
[2] pry ~ =C2=BB  Time.new(2013, 10, 27, 2, 0).localtime.dst?
false
~~~

It appears that in 2.2.0 is correct according to the UK Government: https:/=
/www.gov.uk/when-do-the-clocks-change.

Having discussed this in IRC it would appear that 2.2.1's behaviour is the =
same as in 2.0.0 and 2.1.5.

I tested both with version 1.2.2 of the tzinfo gem installed.



--=20
https://bugs.ruby-lang.org/