Date Serial Function

Named Arguments

Syntax

DateSerial(year, month, day)

year

Use: Required

Data Type: Integer

Number between 100 and 9999, inclusive, or a numeric expression.

month

Use: Required

Data Type: Integer

Any numeric expression to express the month between 1 and 12.

Use: Required

DateSerial Function 203

Data Type: Integer

Any numeric expression to express the day between 1 and 31. Return Value Variant (Date). Description

Returns a Variant 7 data subtype (a date) from the three date components (year, month, and day). For the function to succeed, all three components must be present, and all must be numeric values. The value returned by the function takes the short date format defined by the Regional Settings applet in the Control Panel of the client machine.

Rules at a Glance

• If the value of a particular element exceeds its normal limits, DateSerial adjusts the date accordingly. For example, if you tried DateSerial (96,2,31)—February 31, 1996—DateSerial returns March 2, 1996.

• You can specify expressions or formulas that evaluate to individual date components as parameters to DateSerial. For example, DateSerial (98,10+9,23) returns 23 March 1999. This makes it easier to use DateSerial to form dates whose individual elements are unknown at design-time or that are created on the fly as a result of user input.

Example

Dim iYear As Integer Dim iMonth As Integer Dim iday As Integer iYear = 1987 iMonth = 3 + 11 iday = 16

MsgBox DateSerial(iYear, iMonth, iday)

Programming Tips & Gotchas

• If any of the parameters exceed the range of the Integer data type (-32,768 to 32,767), an error (runtime error 6, "Overflow") is generated.

• The Microsoft documentation for this function incorrectly states, "For the year argument, values between 0 and 99, inclusive, are interpreted as the years 1900-1999." In fact, DateSerial handles two-digit years in the same way as other Visual Basic date functions. A year argument between 0 and 29 is taken to be in the 21st Century (2000 to 2029), year arguments between 30 and 99 are taken to be in the 20th Century (1930 to 1999). Of course, the safest way to specify a year is to use the full four digits.

See Also

DateAdd Function

204 Chapter 7- The Language Reference

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