# IsDate

Returns TRUE if string can be converted to a date/time value; otherwise, FALSE. Note that ColdFusion converts the Boolean return value to its string equivalent, "Yes" and "No."

See also ParseDateTime, CreateDateTime, and IsNumericDate.

### Syntax

    IsDate(string)

##### string

Any string value.

### Usage

Years from 0 to 29 are interpreted as 21st century values. Years 30 to 99 are interpreted as 20th century values.

### Examples

    <!--- This example shows the use of IsDate --->
    <HTML>
    <HEAD>
    <TITLE>
    IsDate Example
    </TITLE>
    </HEAD>

    <BODY BGCOLOR=silver>
    <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, and discover if
    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>

    </BODY>
    </HTML>