birthday notifications xD

it has been bothering me for few years, but it might be difficult to do it: its very hard to know when is your friends birthday on mydramalist !!! of course i write on my notebook some of my friends birthday dates so i wouldnt miss them, but its not very convenient when there are  many friends, so it would be really nice if there was a birthday notification^^ its very sad when nobody wishes you a happy birthday until you write on feeds :"today is my birthday..."