mem - Thanks for the reply and new time set function.
Is there a common external site you guys use here to link to ?
I am thinking of building some king of general purpose logger which I want to run on batteries (1 li-ion bat) but I am afraid if I reduce the clock speed I will loose the functionality of the RTC .
AN example would be loging my body temperature along the day and having the Atmega wake up every min or so and sample the temperature place in flash with current time and go back to sleep . Other examples would be to wake up on external events (open door etc').
B.T.W this is a link to the project I posted on INSTRUCTABLES http://www.instructables.com/id/Arduino-True-Battery-Capacity-Tester-Li-IonNiMH/