Start time,End time
"2012-08-17 11:15:00","2012-08-17 11:50:00"
"2012-08-17 12:30:00","2012-08-17 13:05:00"
"2012-08-17 13:45:00","2012-08-17 14:30:00"
"2012-08-17 15:15:00","2012-08-17 15:55:00"
"2012-08-17 16:45:00","2012-08-17 17:30:00"
"2012-08-17 18:15:00","2012-08-17 19:00:00"
"2012-08-17 19:55:00","2012-08-17 20:45:00"
"2012-08-17 21:45:00","2012-08-17 22:30:00"
"2012-08-17 23:30:00","2012-08-18 00:30:00"