History

Time	Change
2017-03-31 02:16:37+00:00	Created
2017-03-31 02:16:37+00:00	Associated with 相対時刻
2017-03-31 02:30:21+00:00	Associated with 相対時間
2017-03-31 03:01:04+00:00	Associated with 経過時間
2019-06-09 07:14:27+00:00	Associated with relative time