International Pillow Fight Day 2014

Revelers take part in a giant pillow fight on the north terrace of Trafalgar Square on International Pillow Fight Day April 5, 2014, in London.

The event, which was created in 2008, claims worldwide participation of more than 80 cities for the 2014 edition.

England

Revelers take part in a giant pillow fight on the north terrace of Trafalgar Square for International Pillow Fight Day April 5, 2014, in London.

Revelers take part in a giant pillow fight on the north terrace of Trafalgar Square on International Pillow Fight Day April 5, 2014, in London.

Revelers take part in a giant pillow fight on the north terrace of Trafalgar Square on International Pillow Fight Day April 5, 2014, in London.

People hit each other with pillows during International Pillow Fight Day in Valencia, Spain, April 5, 2014.

People hit each other with pillows during International Pillow Fight Day in Valencia, Spain, April 5, 2014.

People hit each other with pillows during the fourth International Pillow Fight Day in Hong Kong April 5, 2014.

Some 200 people formed a sea of pillows and loose feathers as they went at each other while wearing a colorful assortment of pajamas.

People fight with pillows during International Pillow Fight Day in Ljubljana, Slovenia, April 5, 2014.

Young people take part in International Pillow Fight Day April 5, 2014, in Stockholm, Sweden.

A young man wears a bathrobe as he takes part in International Pillow Fight Day April 5, 2014, in Stockholm, Sweden.

Young people react as they take part in International Pillow Fight Day April 5, 2014, in Stockholm, Sweden.

People fight with pillows at University Square on International Pillow Fight Day in Bucharest, Romania, April 5, 2014.

People fight with pillows at University Square on International Pillow Fight Day in Bucharest, Romania, April 5, 2014.