History

Time	Change
2017-01-05 16:21:29+00:00	Created
2017-01-05 16:21:29+00:00	Associated with Length of Day
2017-01-05 16:21:38+00:00	Associated with LOD
2017-01-05 16:24:59+00:00	Associated with 平均太陽日
2017-06-08 09:41:07+00:00	Associated with 1日の長さ