In Japan May 5 is Children's Day.
In Japan, May 5 is Children's Day, a day to celebrate children. This day combines what used to be celebrated as the Dolls' Festival on March 3 and the Boys' Festival on May 5. (http://www.enotes.com/history-fact-finder/holidays-observances/what-childrens-day)
In the United States, Children's Day occurs on the second Sunday of June. It is primarily a church oriented day of recognition for youth to participate in the service of the church. Some calendars have this day occurring in October or November depending on the denomination.
In India, November 14th the birthday of the first Prime Minister of India Jawaharlal Nehru is celebrated as 'Children's Day.' However, the practice of celebrating November 14th as 'Children's Day' in India was begun only after Pandit Jawaharlal Nehru's death in the year 1963.
This is because in his life time Nehru was very fond of small children and spent much of his free time with them. Wherever he went in India, Nehru was always surrounded by small children. His ability to establish an immediate rapport with children was legendary.
Children's day is celebrated in India on 14 November of every year. This tradition of celebrating children's day was started by independent India's first prime minister Jawaharlal Nehru, who took special interest in development of children, and started the practice of celebrating children's day to promote activities related to children.
Incidentally children's day in India - that is 14 November - coincides with birth day of Jawaharlal Nehru.