I found this George Burns reference and was puzzled by it. As far as I know, I don't use any kind of synchronizing service.
Users>myname>Library>Logs>Sync>syncservices.log:
2015-06-28 12:45:28:001|SyncServer|201|110f40|SyncServer|Warning| Refreshing watchdog because of a calendar time change alert. 2015-06-28 12:47:28:800|SyncServer|201|110f40|Server|Info| Cancelling all sync plans. 2015-06-28 12:47:28:802|SyncServer|201|110f40|Server|Info| Goodnight, Gracie.