CFIF date condition

Adam, FWIW I'll say I've never seen that sort of conditional check before. I'm not aware of anything inherent to either cf or html form processing where that // value has any implicit meaning (including a meaning of not null).

Instead, I'd wonder if your code preceding that line might set that form field to that value--under some condition, such as if the incoming form field value is empty. One way that might be done is with cfparam, which names a variable and a default which is set if the variable doesn't exist at that point. 

Just search your code for "//". I'd expect it would only be used (normally) in a url--which would be easy to recognize. Of course, if that template does a cfinclude, or calls any cfc method, or is under the control of an application.cfc/cfm, you'll need to search those as well. 

Let us know what you find.