Trafalgar Square Authority in conjunction with the charity Unicef, who began ticketing the event to control crowd numbers. A Christmas ceremony has been held in the square every year since 1947. A Norway spruce (or sometimes a fir) is presented by Norway's capital city, Oslo as London's Christmas tree, a token of gratitude for Britain's support during World War II. (Besides war-time support, Norway's Prince Olav and the country's government lived in exile in London throughout the war.) The Christmas tree is decorated with lights that are switched on at a seasonal ceremony. It is usually held twelve days before Christmas Day.
Trafalgar Square Trafalgar Square Trafalgar Square ( ) is a public square in the City of Westminster, Central London, built around the area formerly known as Charing Cross. Its name commemorates the Battle of Trafalgar, a British naval victory in the Napoleonic Wars with France and Spain that took place on 21 October 1805 off the coast of Cape Trafalgar. The site of Trafalgar Square had been a significant landmark since the 13th century and originally contained the King's Mews. After George IV moved the mews to Buckingham Palace, the area was redeveloped by John Nash, but progress was slow after his