Date and time tasks don't make sense (if not in UTC)

還沒有人認領這個 Issue。

Maybe there's an error in my logic.
But all the tasks & solutions in [*Date and time*](https://javascript.info/date#tasks) don't really make sense if you aren't coincidentally living in UTC+0, right?

My Win 10 always displays dates with 1 hour delay (because I'm in central European summer time UTC+1):
`console.log(new Date(2012,2,1)) ` doesn't display 1st of March but `2012-02-29T23:00:00.000Z`

Shouldn't the tasks explicitly work with UTC time zone & the respective methods, in order to make results inclusive?

從 issue 中連結的日期和時間任務區段開始，檢查每個任務對於本地時間、UTC 以及所使用的 Date 方法的假設。在非 UTC 時區中重現這些範例，然後更新任務的文字或範例，使預期的時區明確，且所述結果保持一致。

由索引模型根據 Issue 內容生成。