i hope to have understood: should not you simply add the day and month to the custom field of your registration page? it is allowed from the back end of buddypress and these data are shown in profile pages.
While I could make them separate fields, they would not appear together in the profile. Using the date format makes it easier for it to appear as a date, without the year if necessary. Many people do not wish to list their complete birthday where it is visible on the net for security purposes.
So, it would still be helpful to know where this can be modified. Thanks!
Kelly
I wonder if I should make a small addition to my events plugin to be able to set up a simple birthday field onto the profile page… should be possible. I’m going to go noodle with this.
How wonderful! Please let me know if you need a beta tester for it. 
Kelly
We need to get Andy to changed the member theme not to show private profile fields, and then use those private profile fields in custom boxes to diaplay stuff. This would be a great way to ask for zipcode, and build a custom module to show a Google Map, or ask for birthday and just show a count down timer until their birthday.
Where I don’t expect this to be in the 1st version, but would be nice to get the details hammered out in early post release versions.
Brad
Just released version .55 of bp-Events plugin on my website (http://www.erwingerrits.com).
Version .55 has some bug fixes, some CSS fixes and profile birthday event integration as well as group events, which was a popular request.
would it also be possible to include an option to display the calulated age from the birthday field, i would rather it show their age than birthdate,
i have an age field but it would be much better if it updated everytime they got older, this can be easily calculated from the birthdate
Yes, I can make an option in the back end to show user’s age instead of the birthdate. Will try to put that in .56
