member birthdays

I'm using this template code in a template modification, it works for the most part just not the comparison of the visitors age to the forum age limit set. <xf:set var="$birthday" value="{{ $xf.visitor.Profile.birthday.age }}" /> <xf:foreach loop="$threads" value="$thread"> <xf:if...

We have a member with a birthday, the first since my upgrade. She started showing up yesterday and is still there today. Her birthday on her profile is actually today. Does it start notifying a day ahead or something? Or am I running into some kind of weird date issue.