"How is the TIME on the router set up? What time zone are you in?"
Why should any of that matter? I am in Eastern Daylight time. The router is set to Eastern Time, Day light savings time is enabled, and offset is +1 hour. NTP server is enabled and set to time.nist.gov
There really shouldn't be anything else. My crappy Linksys kept time for 8 yrs. This thing has lost 1 hr on 4 different occasions and its less than a yr old!!! The last time it also didn't know what day it was, on July 14 the router said it was June 24Th !
This should be a trivial, l straight forward feature. But is essential for access controls and anything else that needs a time schedule.
If it looses an hour isn't it apparent that the router is no longer updating time from the server, or, the DST offset is no longer applied or it has skipped ahead in time zone.