DateAdd(datepart, number, date)

Returns a date to which a specified time interval has been added.

See also DateDiff, DatePart, and CreateTimeSpan.

datepart

One of the following strings:

number

Number of units of datepart to add to date (positive to get dates in the future or negative to get dates in the past).

date

Date/time object in the period from 100 AD to 9999 AD.

Usage

The datepart specifiers "y," "d," and "w" perform the same function -- add a certain number of days to a given date.

When passing a date/time value as a string, make sure it is enclosed in quotes. Otherwise, it is interpreted as a number representation of a date/time object, returning undesired results.