History

Time	Change
2014-05-15 08:31:37+00:00	Created
2014-05-15 08:31:37+00:00	Associated with recurring time interval
2014-05-16 10:59:00+00:00	Associated with 循環時間間隔
2014-05-16 13:17:44+00:00	Associated with 反復時間間隔