Google is in Japanese on my side.

I get the following:

  2022. 開始:
  3月12日 土曜日
  終了:
  3月13日 日曜日

Which translates as:

  2022. Start:
  Saturday, March 12
  End:
  Sunday, March 13

Interestingly, this is a different result from what is reported by other people here.

For "last day of february 2022", I get the correct answer.