Been a while since I posted anything here!

One of my latest projects is a HP Omnibook XE4100 - a Tulatin-based Celeron laptop from 2002. Unfortunately, I seem to have run into a bit of a weird bug. When trying to run Windows XP, it keeps interpreting the laptop's date as 1921 after every reboot. Doesn't matter if it is SP2, SP3 or a mostly-updated SP3 - same issue occurs. Any pre-2020 date is picked up correctly, but 2020 onwards tries to turn the laptop into a time machine. Even weirder? Windows Millennium Edition appears to have no issue with this date whatsoever. I tried installing the latest BIOS but no change - anyone have any idea on how I can fix this, since the laptop is of course not going to ever be connected to the internet?