Created attachment 39030 [details] Patch for the DateValue and the TestDateValue classes to return #VALUE! for empty string The DATEVALUE function in Excel evaluates to #VALUE! when a blank or empty string argument is passed in. POI implementation returns a blank value which is then displayed as 0. Patch for the DateValue and the TestDateValue is attached. Please let me know if anything in this bug or the patch can be improved as I'd like to submit (and possibly fix) more bugs.
thanks - merged with r1912313