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Children's Day (May 5)
A national holiday on May 5, one of the days of Golden Week, set aside for children's happiness and growth. It falls on the old Boys' Festival, 端午の節句.
Written with hiragana こども, not 子供, in the official name of the holiday.
Cultural note
The day keeps the customs of 端午の節句, which celebrated boys: families fly 鯉のぼり (carp streamers), display a samurai helmet or armor (五月人形), and eat 柏餅 or ちまき. Girls have their own day, 雛祭り on March 3, which is not a holiday.