If you turned 30 this year, congratuations. An institution is marking the same milestone: the National Aquarium in Baltimore.

They're welcoming anyone born in 1981 to join them on Monday, Aug. 8 for $5 admission.* They're serving up 1,000 cupcakes as part of the fun.

If you're not in that happy club, you might still consider stopping by to take part in the party out on the pier this weekend, with free events and entertainment on Friday, Saturday and Sunday.

*Updated with the correct date.