The plugin will only recognize the first birthdate listed in a profile. I have couples on my site, and would love to have the other half of the couple get the birthday recognition. Feels like I'm leaving them out.
This is a custom code modification of the Birthday plugin as it supports only base profile question not the user-created.
You will need to do that on your own, if you're good at programming or hire a programmer to do that for you. You can do that here: http://www.oxwall.org/market/specialists
Thanks for the response. Would have been great if it just looked at birth date fields, and not just the base field. The alternative seems like it could be very expensive, and questionable as to whether it will remain functional with future updates. Hopefully Oxwall will consider adding a second optional birth date field to the base questions in a future update.
I have submitted a request on uservoice to have a second birthday field added to the base profile questions where either, or both can be used via profile types. To my understanding, if it is a base question, developers would be able to recognize the second field in their plugins.