Adding a number of months to a start date to obtain an 'end date'

Hello all,

I am wanting to add a number of months (e.g. 21) to a start date (e.g. 08/12/2011) to obtain an end date in the format of (dd/mm/yyyy). I tried using the function 'EDATE', but it did not appear capable of returning what I am after.

Any suggestions would be greatly appreciated - I am sure it is simple.

Thank you in advance.

Thank you. This issue is similar to what I was looking for.