Hi, Abhinav!
I'd recommend you to read the three first green sticky topics at this forums main page. There you'll find general guidelines about how this site and community operates (introducing yourself, posting files, netiquette rules, and so on).
Among them you're prompted to perform searches within this site before posting, because maybe your question had been answered yet.
Feel free to play with different keywords so as to be led thru a wide variety of articles and posts, and if you don't find anything that solves your problem or guides you towards a solution, well, come back here, tell us what you've done, consider uploading a sample file as recommended, and somebody surely will read your post and help you.
And about your question...
As far as I know I'm afraid you cant do it directly, but with helper columns and depending on what do you want to do with the dates (difference of days, comparisons, ...) you can do a little tricky things if you split them in Year, Month and Day numeric values and then use those helper cells within non-date formulas. For example the number of months might be: =year1*12+month1-year2*12-month2
If needed, for splitting text dates into fields do as follows:
A1: dd/mm/yyyy date formatted as text
B1: =VALUE(RIGHT($A1,4)) for the year
C1: =VALUE(MID($A1,4,2)) for the month
D1: =VALUE(LEFT($A1,2)) for the day
Regards!
