The Nats host the Marlins Friday-Sunday, a series which includes Stephen Strasburg’s final planned home start of the 2012 season. (John McDonnell/The Washington Post)

There was a lot of consternation over the streetscape construction that took place in Adams Morgan over the past year; the project made trying to get to one of the city’s most popular dining and nightlife destinations a real challenge. But if you’ve been avoiding the area because of the headache, the Adams Morgan Day Festival, Sunday from noon to 7 p.m., is a good a reason to make use of the new sidewalks, bike lanes and street improvements.

It’s one of the the 20 events to land on our list of the best things to do in D.C. this weekend. You’ll want to check out the full list, which also includes pennant-race baseball, D.C.’s biggest short film festival and more.

(Note: Service on Metro’s Red Line will be suspended between the Dupont Circle and NoMa-Gallaudet stations from 10 p.m. Friday through Sunday at midnight. Shuttle buses will operate between the two stations, adding significant travel time. Plan your journeys accordingly. Dr. Gridlock has all of the details.)

A few selected highlights:

• If crab cakes and football are what Maryland does, this weekend surely has you covered. The National Football League season begins in earnest, but if you’re more a fan of the crab cakes component, head to Sandy Point State Park for the Maryland Seafood Festival, where you’ll be able to munch on crabs and oysters from the Chesapeake Bay from 11 a.m. to 9 p.m. Saturday and until 6 p.m. Sunday.

• Union Market, a gourmet food market in Northeast D.C. has its grand opening Saturday at 11 a.m., allowing discerning food shoppers to browse oysters, cheese, pickles, gelato, coffee and more from 40 local vendors. On Sunday, the market hosts a local artisan ice cream competition to see who serves up the best ice cream, gelato, frozen yogurt or custard in town.