Today: Marcellus Alexander, vice-president of WJZ-TV, will present awards for posters and essays about Martin Luther King Jr. at the Johns Hopkins Health Plan's 8th annual contest for Baltimore City school fifth-graders at 10:30 a.m. at Harford Heights Elementary School, 1919 North Broadway. Call 554-7130.
Tomorrow: Civil rights strategist Dr. Wyatt T. Walker will speak at the Southern Christian Leadership Conference's Martin Luther King Jr. celebration at 7 p.m. at the Centennial-Caroline Street United Methodist Church, 1029 E. Monument St. Call 276-3079.
Sunday: A Martin Luther King Jr. birthday observance at 6 p.m. at the Israel Baptist Church of Baltimore City, 1220 N. Chester St., will feature Rudolph F. Pierce, judge of the South Boston schools desegregation case. "Rev. Martin Luther King Speaks" will be shown at 5:30 p.m. Call 732-3494.
Monday: A presentation on Martin Luther King Jr. by John Alston will be offered at Dundalk Community College at 7:30 p.m. Call 285-9689.
Wednesday: The University of Maryland Baltimore County will hold its second annual Martin Luther King Jr. observance. Reception at 11:30 a.m. reception will be followed by a luncheon and address by Dr. Margret Zassenhaus. Call 455-2911 or 455-1000 for tickets.
Jan. 19: Religious, community, labor, student and peace groups will commemorate Martin Luther King Jr.'s birthday with a national march on Washington. Call 235-7040.
Jan. 26: J. L. Chestnut Jr., author of "Black in Selma," will speak at the Enoch Pratt Free Library's Martin Luther King Jr. commemorative program. The program will begin at 2:30 p.m. at the Central Library, 400 Cathedral St. An informal reception will follow, and the book will be available for purchase and autographs. Call 396-5494.