School begins for D.C. Public School students Thursday, Sept. 7, with early dismissal at noon. The first day of school for teachers is Friday, Sept. 1, with orientation and program planning scheduled for that day and Sept. 5 and 6.

Other important dates in the 1978-79 public school calendar are:

Oct. 9 - schools closed for Columbus Day: Oct. 30 - professional development day for teachers, schools closed for students; Nov. 10 - schools closed for Veterans Day; Nov 23 and 24 - schools closed for Thanksgiving, and Dec. 25 through 29 - schools closed for winter vacation.

Important dates in 1979 include: Jan. 1 - schools closed for New Year's Day; Jan. 15 - schools closed for Martin Luther King Jr.'s Birthday; Jan. 26 - last day of school for students (first semester); Jan. 29 - first day of school for students and teachers (second semester); Feb. 19 - schools closed for George Washington's Birthday; Feb. 26 - professional development day for teachers, schools closed for students; March 26 through 30 - spring recess; May 28 - schools closed for Memorial Day, and June 14 - last day of school for students and teachers (students dismissed at noon, teachers stay the full day).

Schools will be open on the following commemorative days, when special programs will be planned: Nov. 1 - World Wide Peace Day; Feb. 14 - Frederick Douglass Day; April 9 - Paul Robeson Day; April 30 - Edward Kennedy "Duke" Ellington Day; May 17 - Mary McLeod Dethune Day; May 18 - Malcolm X Day, and June 4 - Mary Church Terrell Day.

Earl "Fatha" Hines Day is to be commemorated during "Music in OurSchools Week," scheduled for the second week in March.