Determines whether a string or Java object can be converted to a date/time value.

Date And Time Functions Decision Functions

createDateTime isNumericDate isValid lSDateFormat lSIsDate parseDateTime

IsDate(string)

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."

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.

<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"> 
Enter a string, find whether it can be evaluated to a date value. 
<input type = "Text" name = "TheTestValue" value = "<cfoutput>#Now()# 
    </cfoutput>"> 
<input type = "Submit" value = "Is it a Date?" name = ""> 
</form>