For schoolchildren and Congress Members alike, Labor Day marks the end of summer and the return to the daily grind. Happily, there are plenty of holiday celebrations planned around the Washington metro area this weekend to help distract you from the imminent return of lunchboxes and briefcases. Here are a few free options:

National Symphony Orchestra Labor Day Concert

The National Symphony Orchestra kicks off its 2011-12 season with a tribute to musicians John Philip Sousa, Duke Ellington and Chuck Brown.

Where: West Lawn of the Capitol or at the Kennedy Center Concert Hall in the event of rain.

When: Sunday at 8 p.m. Gates open at 3 p.m., with open rehearsal at 3:30 p.m.

Kensington Labor Day Parade and Festival

Join this Maryland town in celebrating Labor Day at its 44th annual parade and festival.

Where: Parade starts at intersection of Plyers Mill Road and St. Paul Street. Festival will be held along Howard and Armory avenues.

When: Monday at 10 a.m.

Herndon Labor Day Festival

Food, crafts, and wine and beer tastings will be part of the fun at this Virginia town’s festivities.

Where: Herndon town green

When: Monday from noon to 6 p.m.

Gaithersburg Labor Day Parade

See high school marching bands, clowns, horses and more at this Maryland city’s 73rd annual parade.

Where: Parade starts at Gaithersburg Elementary School, 35 N. Summit Ave.

When: Monday at 1 p.m.

Greenbelt Labor Day Festival

The Maryland city offers three full days of activities, including stilt walking and the Miss Greenbelt pageant, at its 57th annual festival.

Where: Roosevelt Center, 131 Centerway

When: Saturday and Sunday from 9 a.m. to 10:30 p.m., Monday from 9 a.m. to 6 p.m.