Epression for DateAdd in months

[Guest]

Is there a way to add time in months instead of days for and expression.
Here's a current expression:
=[Last Date] + 90 so this give me 90days after the "Last Date"

Instead of 90 days, is there a month feature?

Thanks all

 

[Van T. Dinh]

= DateAdd("m", 3, [Last date])