>lnMonths=(year(ldLast)-year(ldFirst))*12+month(ldLast)-month(ldFirst)-1
>
>This doesn't count the days from the 1st and last months.

Thanks a lot for your help on those date functions.

You may access your account configuration, click on the bottom link to get all your forum activities and you'll be able to proceed with the list I just build with all those date functions.

BTW, you may create a FAQ for this small formula to get the number of months. This is really helpful.