Children's Day is a commemorative date celebrated annually in honor of children, whose date of observance varies by country. In 1925, International Children's Day was first proclaimed in Geneva during the World Conference on Child Welfare. Since 1950, it is celebrated on June 1 in many countries. World Children's Day is celebrated on 20 November to commemorate the Declaration of the Rights of the Child by the UN General Assembly on 20 November 1959. In some countries, it is Children's Week and not Children's Day. The Sikhs celebrate Children Day on 20 December to 27 December. In the U.S., Children's Day is celebrated on the second Sunday of June. History Origins Children's Day began on the second Sunday of June in 1857 by Reverend Dr. Charles Leonard, pastor of the Universalist Church of the Redeemer in Chelsea, Massachusetts: Leonard held a special service dedicated to, and for the children. Leonard named the day Rose Day, though it was later named Flower Sunday, and then named Children's Day. Children's Day was first officially declared...