Ok, This works on the member registration, but not on administrator's new member registration.
As an administrator I already have a list of members I need to add and assign group member, their birthday, and maybe their avatars image.
So I need to do it from the admin page -> Members -> Register New Member.
Otherwise I have to update their profile after I add them. Which will be a lot of work. I'm looking for the fastest way to do this.
I noticed the fields smf use are : bday3 for year, bday1 for month, and bday2 for date. I tried to add these fields on the form and post it, but it doesn't work.
Any idea?