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.
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.
OS X 10.11.6
iMac 21.5", Mid 2011
2.8 GHz Intel Core i7, 24 GB
AMD Radeon HD 6770M
Using Apple computers since 1980