'2013-07-27T09:00:00.000000000+0900',
'2013-07-20T09:00:00.000000000+0900',
'2013-07-20T09:00:00.000000000+0900',
'2013-07-20T09:00:00.000000000+0900',
'2013-07-20T09:00:00.000000000+0900',
'2013-07-20T09:00:00.000000000+0900',
'2013-07-20T09:00:00.000000000+0900',
'2013-07-20T09:00:00.000000000+0900',
'2013-07-20T09:00:00.000000000+0900',
How to move the datetime to end of day, week or hour