Mint computer date keeps resetting to November 2018

Red Squirrel

No Lifer
May 24, 2003
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www.anyf.ca
We have a computer at church and it seems the date/time is always resetting. It's not the CMOS battery, as it's not resetting the whole bios, and it's not going to like 1990, it's going to 2018. For whatever reason something is making it reset to a date in November. it's a huge pain too as it won't let us change the date/time from the GUI with a regular user, have to be root, but you can't login to the GUI as root. So end up having to fiddle around trying to figure out the date command. There's no internet, so no access to google, or an NTP server.

Also for fun I tried changing the date in the BIOS, but in Linux the time is still going to be way off. Is there anything I can try to figure out why this keeps happening?

Failing that is there some kind of external hardware real time clock that runs over USB or something that I would be able to use? Then I can just have a startup script and a cron job that sets the clock based on this device.