Trooping The Color Traditional pomp and military pageantry marks the queen's official birthday ceremony in London, a moment of splendor and chivalric tribute going back to medieval times but still colorful and stirring, from the passing of the color to the impressive slow march by her guards to the rousing music of massed bands. Queen Elizabeth II rides horseback on crowd-lined streets. The queen watches, salutes. Guards parade and march in formation. Spectators look on.