ADD_DAY( )
Adds a specified number of days to a date value.
Syntax
ADD_DAY(date, daysToAdd)
Arguments
date
The date or date expression representing the start date.
daysToAdd
The number of days to add to the start date. If you specify a negative number, the result is as if the number is subtracted from the start date.
Returns
The date value that results from adding the specified number of days to the start date.
Example
The following example adds 15 days to each date value in the InvoiceDate data field:
ADD_DAY([InvoiceDate], 15)