Birthdays, please!

I would like to *try* to keep track of my blogging friends birthdays, if only to just pop in and say "Happy Birthday!"  Could you please click here and add your birthday? You don't even need to put what year, and if it asks for anything you don't feel comfortable giving, just skip that part. I think it may ask for an email address but I don't think it's mandatory if you don't want to leave it. Thanks!