History

Time	Change
2018-06-17 15:11:03+00:00	Created
2018-06-17 15:11:03+00:00	Associated with 日時の整列
2019-06-09 13:13:33+00:00	Associated with 日時の比較
2021-09-21 06:46:15+00:00	Associated with 日付の比較