If you’re using the cfinput type=”datefield” feature to popup an calendar and are finding that it’s not working correctly after ColdFusion 11 update 12 or ColdFusion 2016 update 4, there’s a fix for it. (This could also happen if you’re moving to CF11 or 2016 for the first time and someone else fully updated it before you started testing against it.)
The issue is discussed in a CF bug entry, CF-4198570, but since I’ve had a couple of customers recently ask for help on it, I thought I’d bring it up in a blog post here.
TLDR: you just need to obtain a special hotfix jar file, either the one for CF11 or the one for CF2016. (If you find that just clicking the link shows you gibberish in your browser, right-click the link and save the file instead.)