History

Time	Change
2016-06-15 09:40:44+00:00	Associated with POSIX時間帯
2016-06-15 09:40:44+00:00	Associated with POSIX time zone
2017-03-10 11:23:38+00:00	Associated with タイムゾーン文字列
2019-06-05 12:27:13+00:00	Associated with 環境変数TZ