When is World Down Syndrome Day in United States?

March 1, St. David's Day March 1, Employee Appreciation Day March 1, Read Across America Day March 1, Self-Injury Awareness Day March 1, Zero Discrimination Day March 2, Texas Independence Day March 3, World Wildlife Day March 4, Casimir Pulaski Day March 5, Town Meeting Day March 8, International Women's Day March 10, Daylight Saving Time starts March 11, Ramadan Starts March 14, World Kidney Day March 17, St. Patrick's Day March 17, Evacuation Day March 18, Evacuation Day March 19, March Equinox March 20, International Day of Happiness March 21, International Day of Forests March 21, World Down Syndrome Day March 21, International Day of Nowruz March 21, World Poetry Day March 21, International Day for the Elimination of Racial Discrimination March 22, World Water Day March 23, World Meteorological Day March 24, Palm Sunday March 24, Purim March 24, World Tuberculosis Day March 24, International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims March 25, Seward's Day March 25, International Day of Solidarity with Detained and Missing Staff Members March 25, International Day of Remembrance of Slavery Victims and the Transatlantic Slave Trade March 25, Maryland Day March 26, Prince Jonah Kuhio Kalanianaole Day March 28, Maundy Thursday March 29, National Vietnam War Veterans Day March 29, Good Friday March 30, Earth Hour March 30, Holy Saturday March 31, César Chávez Day March 31, Easter Sunday