totn Excel Functions

MS Excel: How to use the ISDATE Function (VBA)

This Excel tutorial explains how to use the Excel ISDATE function with syntax and examples.

Description

The Microsoft Excel ISDATE function returns TRUE if the expression is a valid date. Otherwise, it returns FALSE.

The ISDATE function is a built-in function in Excel that is categorized as an Information Function. It can be used as a VBA function (VBA) in Excel. As a VBA function, you can use this function in macro code that is entered through the Microsoft Visual Basic Editor.

Syntax

The syntax for the ISDATE function in Microsoft Excel is:

IsDate( expression )

Parameters or Arguments

expression
It is a variant that will be evaluated as a date.

Returns

The ISDATE function returns TRUE if the expression is a valid date.
The ISDATE function returns FALSE if the expression is not a valid date.

Applies To

  • Excel for Office 365, Excel 2019, Excel 2016, Excel 2013, Excel 2011 for Mac, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000

Type of Function

  • VBA function (VBA)

Example (as VBA Function)

The ISDATE function can only be used in VBA code in Microsoft Excel.

Let's look at some Excel ISDATE function examples and explore how to use the ISDATE function in Excel VBA code:

IsDate("1/3/2004")
Result: TRUE

IsDate("Tech on the Net")
Result: FALSE

IsDate("January 3, 2004")
Result: TRUE

For example:

Dim LValue As Boolean

LValue = IsDate("Tech on the Net")

In this example, the variable called LValue would contain FALSE as a value.