IsDate |
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; otherwise, False. ColdFusion converts the Boolean return value to its string equivalent, "Yes" or "No."
Category
Date and time functions, Decision functions
Function syntax

    IsDate(string)

See also
CreateDateTime, IsNumericDate, LSDateFormat, LSIsDate, ParseDateTime
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">
    <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>

string |
A string or a variable that contains one.