>>>nMonths = (year(dDate2)*12 + month(ddate2)) - (year(dDate1)*12 + month(dDate1)) + 1
>
>>Let me give you an example. (a date always have to be the first of a given month)
>>
>>So if:
>>
>>Date1 is April 2000
>>Date2 is May 1999
>>
>>I would like in this case to be able to validate that the specified period covers one year (12 months).
>
>The calculate at the top works for that case try it out.

Thank you Evan!