Sunday fun day! The Gay Agenda lays out your options for LGBT events from all-day hijinks to afternoon delights and all the way through to nighttime parties, shows and special events.

• Day trippers. Speedos and santa hats collide at the St. Nick’s Invitational Swim Meet (top photo) with Atlanta Rainbow Trout @ Ga. Tech, through 4 p.m., Chastain Park Arts Festival, through 5 p.m., and “Picasso to Warhol: 14 Modern Masters” exhibit continues @ the High, through 5 p.m.

• High performance vehicles. The Broadway tour of “Mamma Mia!” (middle photo) closes its run with two performances @ Fox Theatre, 2 p.m. and 8 p.m., plus “Sweeney Todd” continues @ Fabrefaction Theatre, 3 p.m.

• Gather ye together. QuickSilver Country Dancers’ Gender-Free Contra Dance @ Decatur Life Center, 1:30 p.m., recipe for fun during the Chili Cookoff @ Mixx, 3 p.m., and jocular jocks at the Hotlanta Softball Beer Bust with Atlanta Ducks @ Radial, 3 p.m.

• Dress to impress. Wear black – duh – to The Black Party with 5Friends4Life @ Opera, 5 p.m., and see Who’s Who at the black-tie optional Fenuxe 50 Awards: The Ice Party hosted by Fenuxe guys William Duffee-Braun and Tyler Calkins (bottom photo) @ Ventanas, 7 p.m.

• For show, fo sho. The Armorettes Annual Turnabout Show @ Burkhart’s, 7 p.m., Showtime Sunday with Miss Sophia @ Scores, 10 p.m., and more on the all-day, brunch-to-dance bar calendar.

There are even more things to do on today’s Gay Agenda. View the full list on Project Q Atlanta’s interactive community calendar. You can also submit your own events.