See this thread on the Adobe forums: http://forums.adobe.com/message/4219877#4219877 Summary: All of this can be somewhat simplified to this: <cfif "0,6" eq "6,0"> EQUALS <cfelse> NOT EQUALS </cfif> And the answer is - according to CF - "EQUALS". My reaction to that is: WTF? [...] Someone from Adobe has explained this to me. Believe it or not, both "0,5" and "5,0" - to CF - mean 0th May 2012... which equates to 30 April 2012 ("of course" we all cry, whilst slapping our foreheads ;-). Example: <cfset d1 = "0,5"> <cfset d2 = "5,0"> <cfoutput> #dateFormat(d1)#<br /> #dateFormat(d2)#<br /> </cfoutput> Bottom line: strings of format "n,m" where n and m are numeric and fall within the range of month numbers or date-of-month numbers (including 0 in this case) are cast to dates, which is inappropriate. In no situation is "d,m" or "m,d" considered a date, and CF should not treat it as such. -- Adam ----------------------------- Additional Watson Details ----------------------------- Watson Bug ID: 3134331 External Customer Info: External Company: External Customer Name: Adam Cameron. External Customer Email: External Test Config: My Hardware and Environment details: