1. Run the application in a different timezone than the server by setting time-zone parameter in trinidad-config.xml. Use a timezone is 'ahead' of the user's, e.g. if user is in PST (GMT-8), use Europe/Stockholm (which is GMT+1)
2. Run the demo page clientConvert.jspx and enter '12-31-2007' for the date which is restricted to be within 2007.
3. Fill in the other fields and submit the page - the client validator does not give an error, but the server validator does.
The reasons are given in the latest comments on
TRINIDAD-61. Since that issue was closed, I'm filing a new one here for tracking.