VB & VBA in a Nutshell: The Language

DateAdd Function

Named Arguments

Yes

Syntax

DateAdd(interval, number, date)

interval

Use: Required

Data Type: String

An expression denoting the interval of time you need to add or subtract (see the table Section 7.52.3).

number

Use: Required

Data Type: Numeric

An expression denoting the number of time intervals you want to add or subtract.

date

Use: Required

Data Type: Date Variant

A Variant of subtype Date or a literal denoting the date on which to base the DateAdd calculation.

Interval Settings

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

Return Value

A Variant of subtype Date.

Description

Returns a variant of subtype Date representing the result of adding or subtracting a given number of time periods to or from a given date. For instance, you can calculate the date 178 months before today's date, or the date and time 12,789 minutes from now.

Rules at a Glance

• Specify the interval value as a string enclosed in quotation marks (e.g., "ww").

• If number is positive, the result is in the future; if number is negative, the result is in the past. (The meaning of "future" and "past" here is relative to date.)

• The DateAdd function has a built-in calendar algorithm to prevent it returning an invalid date. For example, you can add 10 minutes to 31 December 1999 23:55, and DateAdd automatically recalculates all elements of the date to return a valid date, in this case, 1 January 2000 00:05. This includes leap years: the ...