From DDOT, though MVSQ gives the 29th:
Saturday May 28th United House of PrayerDescription:
DC Police News Release MPD Office of Communications ( Washington, DC)-The Metropolitan Police Department would like to inform the public that multiple events are scheduled to be held this Memorial Day weekend. On Saturday, May 28, 2011, the United House of Prayer for All People will hold its annual Memorial Day parade. This event will begin at 12:00 noon and will conclude at approximately 3:00 pm. The parade will take place along the following route: Begin 6th & M Streets, NW North on 6th St. to S St. West on S St. to 13th St. South on 13th St. to Logan Circle Southwest around Logan Circle to P St. East on P St. to 7th St. South on 7th St. to M St. East on M St. to 6th St. where the parade will end Motorists traveling in the area of both of these events may encounter traffic delays and heavy pedestrian traffic due to the extended road closures. In addition to the roads listed above, many roads leading to these processional routes may be closed as well. Please use extreme caution when driving in these areas. All street closures and listed times are subject to change based upon prevailing or unexpected conditions.