My 2001 MDX clock on the navi screen has been stuck to 0:00 for a day or two. If I go in the hidden menu, the GPS time is correctly showing the Greenwich time so that's not the problem. I cannot manually make time adjustments in the setup menu either.
I have found a discussion about an issue that interestingly happened exactly one year ago on 99 TL models.
The bad news is it seems we have a software issue that causes the clock to malfunction 17 years into its life. The good news per same thread is the issue may resolve itself within a month.