Wikipedia — “Children’s Day”, as an event, is celebrated on various days in many places around the world. Major global variants include an International Children’s Day on June 1 as adopted in the former Communist bloc, and a Universal Children’s Day on November 20, by United Nations recommendation. Many nations declare days for children on other dates.
PS: The video above illustrates why exactly the Communist bloc didn’t survive in this world. So much stuff in that Soviet-fairy-tale was inhumane, totalitarian and opposite to what one would expect! Just imagine, why on earth would you make so many Armenian children cry on International Children’s Day on June 1, when the whole society is supposed to be nice to the youngsters! Common, give poor children a break, people!