So, I switched on my UMB (late 2008), and when I logged into the desktop, there popped a message box stating, "date has been changed to xx/xx/2001 and applications depending on the date may malfunction" When i checkd the "Date and Time" settings in the sys preferences, it was showin Jan 01 2001. Since it automatically updates the date n time frm apple server, it immediately took today's date n time and everything else is working fine now. But, am curious about why this actually had to happen? I hadnt changed the date n time when i had shut it down last night. What could be the issue here? Is my macbook unable to remember date and time? or Something like BIOS battery is dead???