History

Time	Change
2017-05-15 13:19:47+00:00	Created
2017-05-15 13:19:47+00:00	Associated with time synchronization
2017-05-15 13:19:47+00:00	Associated with 時刻同期
2018-07-01 07:58:33+00:00	Associated with 時刻規正
2018-07-01 07:58:33+00:00	Associated with 時刻の規正