[ruby-core:111575] [Ruby master Bug#19295] Time#wday returns 7

Issue #19295 has been updated by akostadinov (Aleksandar Kostadinov).


nobu (Nobuyoshi Nakada) wrote in #note-2:
> Seems same as #19292.

In #19292 it is said that 3.0 and 2.7 don't need while they do.

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Bug #19295: Time#wday returns 7
https://bugs.ruby-lang.org/issues/19295#change-100942

* Author: akostadinov (Aleksandar Kostadinov)
* Status: Closed
* Priority: Normal
* ruby -v: ruby 3.1.3p185 (2022-11-24 revision 1a6b16756e) [x86_64-linux]
* Backport: 2.7: UNKNOWN, 3.0: UNKNOWN, 3.1: UNKNOWN, 3.2: UNKNOWN
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This issue happens since Ruby 2.7, since `Z` and `UTC` are allowed for a zone.

``` ruby
[1] pry(main)> Time.new(2023, 1,3,0,0,0,"UTC").wday
=> 7
[2] pry(main)> Time.new(2023, 1,3,0,0,0,"Z").wday
=> 7
```

This also breaks all weekday `Time#monday?`, etc. methods.



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