International Pillow Fight Day - in pictures

Budapest, Hungary: Feathers swirl in the air in Fovam Square as people throw themselves into the spirit of International Pillow Fight Day Photograph: Bea Kallos/EPA

Zurich, Switzerland: A flashmob shows up for a pillow fight Photograph: Fabrice Coffrini/AFP/Getty Images

New York City, USA: On International Pillow Fight Day, a person in a chicken suit walks down the street with a pillow after the city's sixth event, held at Union Square Photograph: Jessica Rinaldi/Reuters

Brasilia, Brazil: People at a flashmob pillow fight Photograph: Ueslei Marcelino /Reuters

London, UK: A crowd pillow fights in Trafalgar Square Photograph: Ray Tang/Rex Features

Sofia, Bulgaria: People at a flashmob pillow fight Photograph: Stoyan Nenov/Reuters

New York City, USA: People battle in Manhattan's Union Square during a massive pillow fight Photograph: Mario Tama/Getty Images

São Paulo, Brazil: People at a flashmob pillow fight Photograph: Nelson Almeida/AFP/Getty Images

Zurich, Switzerland: Feathers fly at a flashmob pillow fight Photograph: Fabrice Coffrini/AFP/Getty Images

New York, USA: People pillow fighting in Union Square Photograph: Erik Pendzich/Rex Features

London, UK: People pillow fighting in Trafalgar Square Photograph: Ray Tang / Rex Features/Rex Features

New York, USA: A man uses a leaf blower to assist a man covered in feathers in Manhattan's Union Square Photograph: Mario Tama/Getty Images

Budapest, Hungary: Feathers lie on the ground after International Pillow Fight Day in Fovam Square Photograph: Bea Kallos/EPA