GNOME Bugzilla – Bug 701708
Gnome Contacts does not incorporate Birthday Year.
Last modified: 2014-05-30 17:15:15 UTC
Seeing as CardDAV/Owncloud makes use of Birthday Year, I would consider this an enhancement. But after adding contacts' birthdays via Gnome Contacts, all birthdates were set to the current year on the CardDAV server. So I guess it is a minor bug.
There's some discussion about this on the mailing list: https://mail.gnome.org/archives/gnome-contacts-list/2014-April/msg00004.html I agree that you should be able to set the year but this needs to be optional, and we need to figure out a design for it. The other question is what to do in the CardDAV case where a birthday is set without a year.
I would add the year, since the main devs and involved in the process agree on adding the year of the day of of birth.
Fixed in master Pushed here: https://git.gnome.org/browse/gnome-contacts/commit/?id=13ff0d01a259e1411ba7fe399a21ec90be6757f1