When you try to use a calendar picker and the date is past 31 Dec 2038, that date is not available. It’s not possible to pick the date. The calendar picker browsing stops in December 2038.
The Dojo library timezone.js has 2038 as the maximum date. This affects any TRIRIGA environment up to 126.96.36.199. The workaround is to manually enter the date, following the correct format, taking into consideration the localization. The fix is available in Fix Pack 2 for 3.4.2, which is available in Fix Central.
[Admin: This post is related to the 08.07.15 post about APAR IV75813 where you cannot select dates past 31-Dec-2038 with the calendar picker.]