PHOTOS: World Pillow Fight Day

Feathers went flying in London's Trafalgar Square as celebrations for World Pillow Fight Day kicked off on April 5.

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images

World Pillow Fight Day is celebrated in Trafalgar Square, London. Picture: Getty Images