... which BTW is a shame. I don't know which hardware part they left out in order to save 1/4 of a cent per device, but an e-reader not being able to keep its time across reboots is simply a disgrace.
SCNR
PS: Interestingly enough, software updates (like most installer in the dev section, and of course the official updates) seem to keep the date. Maybe it's "soft" vs "hard" reboot. (?)