Trafalgar Day is observed in the United Kingdom every October 21 to commemorate the Royal Navy's victory over French and Spanish forces at the Battle of Trafalgar in 1805. This battle, led by Horatio Nelson and Cuthbert Collingwood, marked a decisive naval victory during the War of the Third Coalition. The day was first celebrated in Trafalgar Square, London, in 1896, and has included parades, formal dinners, and various events throughout the British Empire. Although public celebrations declined during the First World War, Trafalgar Day continues to be marked with military parades and solemn ceremonies, including wreath-laying, primarily in cities like London, Birmingham, Edinburgh, and Gibraltar. Participants often include members of Sea Cadets and HMS Forward, along with various civic organizations. While it is not a bank holiday, the observance remains significant in honoring naval history.