DateAdd Function to Add Year, Quarter, Month etc.

DateAdd("yyyy", 3, "22/11/2003")would return '22/11/2006'
DateAdd("q", 2, "22/11/2003")would return '22/05/2004'
DateAdd("m", 5, "22/11/2003")would return '22/04/2004'
DateAdd("n", 51, "22/11/2003 10:31:58 AM")would return '22/11/2003 11:22:58 AM'
DateAdd("yyyy", -1, "22/11/2003")would return '22/11/2002'

Value Explanation
yyyy Year
q Quarter
m Month
y Day of the year
d Day
w Weekday
ww Week
h Hour
n Minute
s Second