The Unbirthday Song Lyrics

Statistics prove, prove that you've one birthday,
one birthday ev'ry year.
But there are three
hundred and sixty four
unbirthdays.
That is why we're gathered here to cheer.
A very merry unbirthday to you, to you.
A very merry unbirthday to you,
It's great to drink to someone and
I guess that you will do.
A very merry unbirthday to you