Users can enter year '0000' for creation (and other?) events
|Google Code Legacy ID:||Tested version:||2.3|
1. Create an archival description
2. Set creation end date to 0000-00-00
Result: An end date of 0000-00-00 is inserted into the MySQL database
Expected result: We should have validation in place to prevent year 0000, since such a year doesn't exist and doesn't really make sense.