In dataset's refresh , schedule unit use AM/PM and 24 hour unit.
In Next schedule, and In Refresh histories, 24 hour unit used like "May 12 2016 00:30:00 GMT +0900".
In Refresh schedule setting, AM/PM used like "12:30 AM".
and
"01:00 AM" = "01:00:00".
"12:30 AM" = "00:30:00".
Regards,
Yoshihiro Kawabata