“On December 14, 1954, the UN General Assembly recommended that all countries should introduce an annual event from 1956 known as Universal Children’s Day to encourage fraternity and understanding between children all over the world and promoting the welfare of children. It was recommended that individual countries should choose an appropriate date for this occasion.

“At the time, the UN General Assembly recommended that all countries should establish a Children’s Day on an “appropriate” date. Many of the countries respected this recommendation and the Universal Children’s Day has since been annually observed on November 20. There are however, some countries, such as Australia and India, which still chose various different dates during the year to celebrate this day.

“On November 20, 1959, the UN General Assembly adopted the
Declaration of the Rights of the Child
and on November 20, 1989, it adopted the Convention on the Rights of the Child. Since 1990, Universal Children’s Day also marks the anniversary of the date that the UN General Assembly adopted both the declaration and the convention on children’s rights.

“Universal Children’s Day is part of the work carried out by UNICEF, the United Nations Children’s Fund.”

Text is from: http://www.timeanddate.com/holidays/un/universal-childrens-day