What did the pirate say when he turned 80 years old?

What did the pirate say when he turned 80 years old? Aye matey.

This is a pirate joke, and also a pun.

Aye matey is a pirate type phrase that means "yes my comrade", but it also sounds exactly like "I'm Eighty", which would be an appropriate thing to say when you turn eighty.

Happy Pirate's-Day-Eve, by the way!