Issue #17046 has been reported by S_H_ (Shun Hiraoka).

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Bug #17046: Time#to_a yday is 0(given timezone info)
https://bugs.ruby-lang.org/issues/17046

* Author: S_H_ (Shun Hiraoka)
* Status: Open
* Priority: Normal
* ruby -v: 2.8.0dev (2020-07-23T14:44:25Z master 098e8c2873) [x86_64-linux]
* Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN
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I interest in Time#to_a behavior(background is Bug #17042)

Tried whether yday is displayed correctly in `Time #to_a`.
But, yday seems to be 0 when passing the time zone.

```bash
$ ruby -v
ruby 2.8.0dev (2020-07-23T14:44:25Z master 098e8c2873) [x86_64-linux]

$ ruby -r tzinfo -e "p  Time.new(2020, 7, 22, 12, 0, 0).to_a"
[0, 0, 12, 22, 7, 2020, 3, 204, false, "JST"]

ruby -r tzinfo -e "p  Time.new(2020, 7, 22, 12, 0, 0, TZInfo::Timezone.get('America/New_York')).to_a"
[0, 0, 12, 22, 7, 2020, 7, 0, false, #<TZInfo::DataTimezone: America/New_York>]
```

May be must to backport to `2.6` & `2.7`.




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