Congratulations with the end of school year and International Children's Day! The World Conference for the Well-being of Children in Geneva, Switzerland, proclaimed June 1 to be International Children's Day in 1925. 'The welfare of today's children is inseparably linked with the peace of tomorrow's world'. Henri Labouisse. A special offer from Ukie Style - 25% off all kids items till June 2, 2015. Use a discount code "kids" at checkout.