Please remember Henderson Elementary will be closed on Monday, January 20th . Martin Luther King, Jr. Day is observed on the third Monday of each January. He was the chief spokesman of the nonviolent civil rights movement which protested racial discrimination in federal and state law. San Antonio’s annual MLK March is scheduled for Monday the 20th. The march will begin at 10:00 a.m. at the MLK Academy located in the 3500 block of MLK Dr and end at Pittman-Sullivan Park. Each year San Antonio hosts the largest march in the United States. This year the march is expected to draw more than 100,000 adults and children.