Permanent Clock

[Mauricio]

Is there some way of accessing a permanent clock, i.e., a clock that
works even if the system is rebooted or poewered off?
I would like to increment a variable each day, independent of the
system date (once this one users can change!), but not leaving my
script running all the time. Better explaining: every time tha script
is run, it must now if the current day is the same of tha last time
the script was started.If not, increment tha variable!

  thanks for helping,