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IsDate
Last update:
May 18, 2026
Description
Determines whether a string or Java object can be converted to a date/time value.
Returns
True, if string can be converted to a date/time value; False, otherwise. ColdFusion converts the Boolean return value to its string equivalent, "Yes" or "No."
Category
Syntax
IsDate(string)See also
Parameters
Parameter | Description |
string | A string or a variable that contains one. |
Usage
This function checks against U.S. date formats only. For other date support, see LSDateFormat.A date/time object falls in the range 100 AD-9999 AD.
Example
<h3>IsDate Example</h3>
<cfif IsDefined("FORM.theTestValue")>
<cfif IsDate(FORM.theTestValue)>
<h3>The string <cfoutput>#DE(FORM.theTestValue)#</cfoutput>
is a valid date</h3>
<cfelse>
<h3>The string <cfoutput>#DE(FORM.theTestValue)#</cfoutput>
is not a valid date</h3>
</cfif>
</cfif>
<form action = "isDate.cfm" method="post">
<p>Enter a string, find whether it can be evaluated to a date value.
<p><input type = "Text" name = "TheTestValue" value = "<cfoutput>#Now()#
</cfoutput>">
<input type = "Submit" value = "Is it a Date?" name = "">
</form>
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