Y2K38 bug in user manager expiration
If you put an expiration date past 20380119, such as 02/01/2038, validation fails with:
"Invalid expiration date format; use MM/DD/YYYY instead."
Maybe the date picker shouldn't go that far, or change the input validation to show an appropriate message. Not sure we need to fix the fact that you can't set expirations 28 years in the future right now.