What's DoingANTIQUES SHOW -- Friday 11 to 6, Saturday 11 to 6, Sunday noon to 5. $8. National Guard Armory, Hudson and West streets, Annapolis. 410-961-1919.

BASEBALL & SPORTS CARD Show, Saturday 10 to 4. About 40 dealers. $3. Tysons Westpark Hotel, 8401 Westpark Dr., McLean. 301-990-4929.

CAMP & SUMMER PROGRAMS EXPO -- Saturday 10 to 6, Sunday noon to 6. Meet representatives of more than 80 day and overnight summer camps and other programs. White Flint Mall, 11301 Rockville Pike, North Bethesda. 301-231-7467.

ANTIQUES SHOW -- Saturday 10 to 6, Sunday 11 to 4. About 70 exhibitors. $8. Morven Park International Equestrian Center, U.S. 15 at Tutt Lane, Leesburg. 703-779-2800.

"PET FEST AMERICA" -- Sunday 11:30 to 7:30, displays of pet-related products and services; performances by "IAMS' Superdogs" canine acrobats at 1 and 4:30. $19, under 13 $12. MCI Center, 601 F St. NW. 202-432-7328 or 202-628-3200.

For M.L. King Birthday

GOSPEL CONCERT -- Saturday at 6, with Charles Butler & Trinity, Alvin Campbell & Total Praise, Voices of Praise and others. Free. Israel Baptist Church, 1251 Saratoga Ave. NE. 202-682-4022.

RESTON OBSERVANCES -- Gospel concert, Sunday at 4 at Northern Virginia Hebrew Congregation, 1441 Wiehle Ave., Reston; Monday 10 to 5, "Keeping the Promise," information booths, speakers, cultural presentations, children's activities at South Lakes High School, 11400 South Lakes Dr., Reston. 703-476-4500.

"CELEBRITY CELEBRATION" -- Sunday at 6, performances by Ski Johnson, Christel Klingensmith, Corey Hawkins and others. Free, but tickets required. Lincoln Theater, 1215 U St. NW. 202-682-4022 or 202-328-6000.

COMMEMORATIVE CEREMONY -- Monday at 3, with remarks by Harold A. Carter of Baltimore's New Shiloh Baptist Church. Globe Hall, Montgomery College, 20200 Observation Dr., Germantown. 240-777-6530.