About the parade:
A one hour and fifteen minute performance of music and precision marching, the Evening Parade features "The President's Own" United States Marine Band, "The Commandant's Own" The United States Marine Drum and Bugle Corps, the Marine Corps Color Guard, the Marine Corps Silent Drill Platoon, Ceremonial Marchers, and LCpl. Chesty XIII, the official mascot of Marine Barracks Washington.
The ceremony starts at 8:45 p.m., beginning with a concert by the United States Marine Band. The Evening Parade, held every Friday evening during the summer, has become a universal symbol of the professionalism, discipline, and Esprit de Corps of the United States Marines.
The "Oldest Post of the Corps," was established in 1801, and has performed military reviews and ceremonies since its founding. The present-day Evening Parade was first conducted on July 5, 1957.
The presidential inaugurations and specific occasions prompted the parades and ceremonies conducted at the Barracks during the early 1900s. The traditional reveille and morning muster parades were conducted with varying frequency at the post, and they eventually resulted in more formalized ceremonies. In 1934, when MajGen. John H. Russell, Jr. was the 16th Commandant of the Marine Corps, the Barracks initiated its first season of regularly scheduled weekly parades. The parades were conducted in the late afternoon, usually on Mondays or Thursdays and varied from 4 to 5:30 p.m. The parades were commonly referred to as "Sunset Parades." The ceremonies were conducted from April to November, concluding the week of the Marine Corps Birthday, November 10. Read more here