National Children's Day in Japan is on the fifth day of the fifth month every year - that's May 5". People in Japan celebrate children and their happiness. It is also the start of the summer.
People always put some fish outside their houses, and the number of fish is also the number of people in a family. The mother in every family often makes special food for National Children's Day: rice cakes and delicious sweets. People often eat at home, but some restaurants have got special Children's Day menus - a lot of families eat at restaurants, too. Children often wear traditional Japanese clothes and sing a special National Children's Day song, and the boys wear special paper hats.