Over the course of several months we identified some date/time issues that also exist in CF10 and CF11. In CF10 and CF11 there are still more inconsitency issues like in CF2016. Some of the date/time formatter and parser issues have been fixed in CF2016 RTM, but it was still a mess and the functions are not behaving as expected in many cases. We are still in discussion about incorrect IsNumericDate() results not listed below. Please also see ColdFusion 2016: Upcoming new IsDateObject() function that was a result of the issues we faced with below bugs.
Notable changes are: