https://waynealumni.org/ypow.php
from 2004
A while ago the ability to include your birthday to your alumni listing was added. It seems to have been working fine for new registrations, but not so fine for people who were updating an existing listing. Either the ability to change the date did not appear, or the date just didn’t seem to take.
If you had tried to include your birthday previously with no luck, hopefully it will work for you now.