I've been having an issue lately with the clock and date going out of sync. I seem to be resetting it to the correct time each time I log in. This has also caused trouble booting up.
The date and time may be a day ahead of the what it should be, I set it back to the right date and time.
When I next boot up, it detects a problem, after a scan it detects that the time has changed and says something like "Error last login was in future" or something like that.
It's then able to fix the proble then login but I'm still getting the clock &date out of sync.
This is getting very anoying and fustrating.