Umeed hai sab dost kharyat se hongay.
mujhay excel main aik aisa farmula chahiye, for example
main aaj ki date dalta ho 09/01/2012,
06 months k bad Automatically expire nazar ata ho...
OR
kia asa hosakta hain k date k sath days bhi automatically accuont hotay ho.......for exmp, 09/01/2012 = (01), 10/01/2012 = (02)

Please Important hain help karay..