Garter Day is an annual event celebrated by the Order of the Garter, the oldest and most prestigious order of chivalry in England. It takes place on the second Saturday in June at Windsor Castle. During this ceremony, members, known as knights and ladies, wear their distinctive blue sashes and participate in a procession. The day includes a service at St. George's Chapel, where the knights gather to honor their traditions and pay tribute to the patron saint of the order, Saint George. Garter Day is a significant occasion that showcases royal heritage and the values of chivalry.