Nah, dey izn't, but ve makes dem op to haff holidays anyvay, doezn't ve?

If hyu vants, just tink about hyu favorite day so far und make dot vun hyu birthday. Or ask somevun to pick hyu a random date. Or not haff a birthday at all, dot's fine too if hyu doezn't vant de cake. It doez get borink after a vhile.