[TYPO3] startdate and enddate checkboxes Issue

[Saurabh Pareek]

Hi,

In BE of one of the Typo3 sites, I found an strange error like whenever 
I create a new page or page content, the "startdate" and "enddate" 
checkboxes get automatically checked and the date showing in both input 
boxes is 31-12-1969 which should not be the case. Why is it so? How is 
it possible to uncheck the checkboxes and/or how is it possible to 
change this date to the current date? Any clue ?

Thanks,
Saurabh