When is World Cities Day in United States?

October 1, World Vegetarian Day October 1, International Day of Older Persons October 2, International Day of Non-Violence October 2, Last Day of Sukkot October 3, Shmini Atzeret October 4, Simchat Torah October 4, Feast of St Francis of Assisi October 5, Child Health Day October 5, World Habitat Day October 5, World Teachers' Day October 6, World Cerebral Palsy Day October 8, World Sight Day October 9, Leif Erikson Day October 9, World Post Day October 10, World Mental Health Day October 11, International Day of the Girl Child October 12, Columbus Day October 12, Native Americans' Day October 12, Indigenous People's Day October 13, Navy Birthday October 14, International Day for Natural Disaster Reduction October 15, International Day of Rural Women October 15, White Cane Safety Day October 16, Boss's Day October 16, World Food Day October 17, Sweetest Day October 17, International Day for the Eradication of Poverty October 18, Alaska Day October 19, Alaska Day October 24, United Nations Day October 24, World Development Information Day October 27, World Day for Audiovisual Heritage October 29, World Stroke Day October 30, Nevada Day October 31, World Cities Day October 31, Halloween