Q: What goes up and never comes down?
A: Your age!

Q: Does a pink candle burn longer than a blue one?
A: No, they both burn shorter!

Knock-knock!
Who's there?
Abby!
Abby who?
Abby Birthday to you!

Q: What do you say to a cow on her birthday?
A: Happy Birthday to Moo!

Q: What do you say to a cat on her birthday?
A: Happy birthday to mew!

Q: When is a birthday cake like a golf ball?
A: When it's been sliced.

Knock Knock!
Who's there?
Gus.
Gus who?
Gus how old I am today!

Q: Why are you cutting the cake with a chisel?
A: Because it's marble cake.

Knock Knock!
Who's there?
Ivan.
Ivan who?
Ivan a piece of your cake!

Knock Knock!
Who's there?
Freddy.
Freddy who?
Freddy to open your presents!

Q: Why did the man act wild and crazy on his birthday?
A: He was trying to age disgracefully.

Knock Knock!
Who's there?
Omar.
Omar who?
Omar goodness! Your present escaped!

Knock Knock!
Who's there?
Matty.
Matty who?
Matty nice of you to invite me to the party!

Knock Knock!
Who's there?
Mark.
Mark who?
Mark your calendars... my birthday's just around the corner!