Quote Originally Posted by Thomone View Post
.... I also did a GPS reset.
Try also by clearing the non-volatile memory. Back up anything you might want to restore beforehand. Clearing NV is done using the Diagnostics Page menu and is even more comprehensive than a hard-reset done via holding the lower RH corner of the screen. [Only registered and activated users can see links. ]

Eventually, I plan to discharge the battery completely in order to reset the GPS clock.
If clearing NV doesn't help then that's what you should do as draining the PCB power completely has long been known to correct the rollover problem. If you don't wish to wait while it fully discharges, you may alternatively open the nuvi and disconnect the battery for a few minutes.

I have an old nuvi 1200 somewhere (maybe it's an 1100 - same hardware and firmware). If i can find it i'll update it then test it to see if i can replicate your problem. However, AFAICR the 1xxx series wasn't affected by the rollover but i may be not remembering that correctly.

BTW, an older version of the TZ map isn't causing your incorrect time/date.... and regardless, it seems that you have the latest V39 loaded anyway.