i followed steps on this link to add a date field to my custom module :
http://magentomechanic.blogspot.com/2010/01/to-add-custom-date-field-in-custom.html
Every
Well amazing stuff happened !
i just removed the code from admin controller that was saving the dates fields and All good to go !!!
It saved the date automatically in the DB.
This may help many and save them time unlike me, i spent most of the time on it.