You’ve got a lot to learn this weekend.

GIVE
Once Upon a Prom
What: Donate dresses to underserved young women for their big night.
Why: It’s a change of a dress.
When: Thru May 4. Mon.-Fri., 11 a.m.-6 p.m.; Sat., noon-5 p.m.
Where: Drop off at Ann Hand, 2900 M St. NW, at 29th St. (202-333-1529) or e-mail princess@onceuponaprom.org to arrange for pickup.

EAT/DRINK
The Liberty Tavern
What: The new restaurant and bar offers eating upstairs, drinking downstairs, wood-fired pizza, and seasonal specialties.
Why: Give yourself liberty or give yourself death.
When: Mon.-Thurs., 5-10 p.m.; Fri. & Sat., 5-11 p.m.
Where: 3195 Wilson Blvd., Arlington (703-465-9360).

DO
Learn-a-Palooza
What: A day of free workshops on everything from speaking Polish and deep-frying a turkey to making videos and hula hooping.
Why: Live and learn.
When: Sat., 10 a.m.-6 p.m.
Where: Dupont Circle, Adams Morgan, and Columbia Heights.

BUY
The French Market
What: Bookhill sidewalk sale with more than 30 boutiques like Sugar, Sherman Pickey, Darrell Dean, and Piccolo Piggies.
Why: Book it.
When: Fri. & Sat., 11 a.m.-7 p.m.
Where: Wisconsin Ave. NW, b/t Reservoir Rd. & P St.

SEE
ArtDC
What: The city’s first modern and contemporary art fair, with artwork from national and international artists, plus talks by dealers, curators, and collectors.
Why: Art you glad it’s here?
When: Fri.-Sun., 11 a.m.-7 p.m.
Where: Washington Convention Center, 801 Mount Vernon Pl. NW, b/t 7th & 9th Sts., hall e (202-249-3000).