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 Square, the world premiere of the final film in the "Harry Potter" series, "Harry Potter and the Deathly Hallows – Part 2", was held in Trafalgar Square, with a red carpet linking the squares. Fans camped in Trafalgar Square for up to three days before the premiere, despite torrential rain. It was the first film premiere ever to be held there. A Trafalgar Square in Stepney is recorded in "Lockie's Topography of London", published in 1810. Trafalgar Square in Scarborough, North Yorkshire gives its name to the Trafalgar Square End at the town's North Marine Road cricket ground. National Heroes