Reel Big Fish headlines the Frozen Harbor Music Festival. Credit: Jonathan Thorpe.

There’s an extra day on the calendar this month, so let’s make the most of it. Several spots are throwing parties just for the 29th–after all, it only comes around once every four years. Elsewhere, check out lots of music around Inner Harbor, and a couple Mardi Gras events keeping the celebration going. Enjoy:

Friday, Feb. 28
Frozen Harbor Music Festival: Feb. 28-29 at Power Plant Live! The music festival features nine stages and more than 100 acts around the Inner Harbor complex. Headliners include Reel Big Fish, The Bridge and more.

Baltimore Bike Party: 6:30 p.m. at St. Mary’s Park. This month’s ride heads to Charm City Meadworks. Theme: Queen Bee & the Hive.

Image via Monster Jam’s Facebook page.

Monster Jam Triple Threat Series: 7 p.m. at Royal Farms Arena. The demolition derby breaks out in head-to-head competition with monster trucks, speedsters and ATVs all on hand.

Disco Gaming Party: 7 p.m. at North Ave. Market. The HiScore party offers a chance to play arcade games with funk and house music providing the soundtrack.

All-American Nativism“: 7 p.m. at Red Emma’s. Daniel Denvir presents his work on the history that led to President Donald Trump’s election, from the perspective of immigration politics.

Live Music with Roger Girke: 7 p.m. at Monument City Brewing Company. The Highlandtown brewery hosts blues night.

Duckpin Bowl-A-Rama: 7 p.m. at Stoneleigh Lanes. UNION Craft Brewing hosts a duckpin bowling party.

“Premature” Opening Night: 7 p.m. at The Parkway Theatre. Actress Zora Howard will be in-person as the Maryland Film Festival selection returns for a longer run.

The Flying Faders: 8 p.m. at Baby’s On Fire. The local surf favorites play the recently opened Fells Point spot.

BIG Time: 8 p.m. at Baltimore Improv Group. Stacey Chambers of famed fashion bus Gogo’s Retread Threads tells stories of her life, and improv comedy ensues.

Scenes from MasterPique Theater: 8 p.m. at Black Cherry Puppet Theatre. The musicians of Pique Collective present theatrically-inspired in Hollins Market.

Nat Baldwin & Lexie Mountain: 8:30 p.m. at Normal’s Books & Records. The double bass player and sound artist, respectively, perform solo sets and then join forces for a duet.

Emo Nite: 9 p.m. at Ottobar. Emo Nite LA plays all your moody favorites of the ’90s and aughts.

Saturday, Feb. 29

Breakfast at Tiffany’s“: 10 a.m. at The Senator Theatre. The screening supports the Junior League of Baltimore’s Little Black Dress Initiative, which raises awareness and funds to combat poverty.

Fresh at the Avenue 4th Anniversary Celebration: 11 a.m.-4 p.m. at The Avenue Market. Head to Pennsylvania Avenue for produce, music, crafts and more.

Leap Day Party: All day at Diamondback Brewing. The Locust Point brewery is celebrating the extra day with the release of a new barleywine and live music.

A Big Beer Leap Year: noon-4 p.m. at Checkerspot Brewing Company. The brewery offers samples of every special-edition, high-ABV beer its ever released.

Leap Day Release: noon-6 p.m. at Oliver Brewing Company. Sample six new beers at the Monument + Oliver collab event.

People-Powered Public Transit: Ballot Launch: 2 p.m. at Enoch Pratt Free Library. The Baltimore Regional Transit Authority launches a ballot initiative campaign with a crankie performance, visual art and breakout sessions.

Mardi Gras High Tea: 2 p.m. at Twisted Teahouse. The Hampden tea house gets festive with beads, jazz and masks.

Foodie Tour: 3 p.m. at Fells Point. Bite of Baltimore hosts a progressive dinner through five restaurants in the area.

Fake Wedding 2020: 7 p.m. at Columbus Center. Volunteering Untapped hosts a big bash with simulated nuptials and a real-life party.

Tinder Live! with Lane Moore: 7 p.m. at Ottobar. The comedy show combines Tinder and improv.

“The Garden of Forking Paths” and “Sounds from the base of a mountain”: 7 p.m. at Current Space. It’s opening night for pair of group exhibitions at the art gallery.

PSST! Let’s Party: 8 p.m. at Wet City. DJ Ryan Doubleyou spins house and pop for Leap Day.

Viva Brasil: 8 p.m. at Creative Alliance. The Carnival dance party features Nation Beat and JP Silva.

Leap Day: 9 p.m. at Bond Street Social. The Fells Point spot has $29 for a four hours of open bar.

Mardi Gras: 9 p.m.-1 a.m. at Old Major: Stoop Nerds hosts a dance party, New Orleans style.

Sunday, March 1
Flea Market Extravaganza: 10 a.m.-2 p.m. at WRECK Room. The “destructotherapy” spot has items that it can’t break. Come check them out, and buy something to take home.

Swap Meet/Skater Trader 2020: noon-6 p.m. at Waverly Brewing Company. Skaters: Check out goods from Vu Skateshop, Speedlab Wheels and Greyscale Boards, or bring your own to trade.

Bookbinding Workshop: 12:30-3 p.m. at the Baltimore Museum of Industry. Wonderbooks creator Jordan Levine teaches you how to bind stationary, a zine, an art book or a portforlio.

National Pig Day Event: 1-3 p.m. at Washington Blvd. and Poppleton St. Pigtown Main Street hosts a chance to meet some real pigs. Plus, crafts, storytelling and snacks.

Four Women“: 2 p.m. at Reginald F. Lewis Museum. The production features a look at the lives of Elizabeth Catlett, Billie Holiday, Gloria Richardson and Joyce J. Scott.

Monteverdi’s “Vespers”: 3-5 p.m. at JHU Shriver Hall. The Baltimore Choral Arts Society and Peabody Conservatory come together to perform the masterwork.

MICA Film and Animation Fest: 4-7 p.m. at Parkway Theatre. The collaboration between Women in Animation at MICA and Empowering Voices in Film returns for its second year with more than a dozen films.

John Tillery Presents Midnight: 3:30 p.m. at Mobtown Ballroom. The fashion show features “boho chic looks influenced by the eras of the ’60s and ’70s.”

Image via Facebook.

Catherine Russell: 5-7:30 p.m. at the Baltimore Museum of Art. The jazz and blues vocalist will be in concert, performing the great tunes of the American songbook.

The Acacia Strain: 6 p.m. at Baltimore Soundstage. The Massachusetts metalcore band headlines a bill with Rotting Out, Creeping Death, Chamber and more.