May 2, 2019 World Tuna Day
May 2, 2019 National Day of Prayer
May 3, 2019 World Press Freedom Day
May 3, 2019 Kentucky Oaks
May 4, 2019 Kent State Shootings Remembrance
May 4, 2019 Kentucky Derby
May 4, 2019 Rhode Island Independence Day
May 4, 2019 National Explosive Ordnance Disposal (EOD) Day
May 5, 2019 Cinco de Mayo
May 6, 2019 Ramadan starts
May 6, 2019 National Nurses Day
May 8, 2019 Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War
May 8, 2019 World Ovarian Cancer Day
May 8, 2019 Victory in Europe Day
May 9, 2019 Yom Ha'atzmaut
May 10, 2019 Confederate Memorial Day
May 10, 2019 Confederate Memorial Day
May 10, 2019 Native American Day
May 10, 2019 Military Spouse Appreciation Day
May 11, 2019 World Migratory Bird Day
May 12, 2019 International Nurses Day
May 12, 2019 Mother's Day
May 15, 2019 International Day of Families
May 15, 2019 Peace Officers Memorial Day
May 17, 2019 World Information Society Day
May 17, 2019 National Defense Transportation Day
May 18, 2019 Armed Forces Day
May 18, 2019 Preakness Stakes
May 19, 2019 Day of Vesak
May 20, 2019 World Autoimmune
May 21, 2019 World Day for Cultural Diversity for Dialogue and Development
May 22, 2019 International Day for Biological Diversity
May 22, 2019 Emergency Medical Services for Children Day
May 22, 2019 National Maritime Day
May 22, 2019 Harvey Milk Day
May 23, 2019 International Day to End Obstetric Fistula
May 25, 2019 African Liberation Day
May 25, 2019 National Missing Children's Day
May 27, 2019 Memorial Day
May 27, 2019 Jefferson Davis' Birthday
May 29, 2019 International Day of United Nations Peacekeepers
May 30, 2019 Ascension Day
May 31, 2019 World No Tobacco Day
May 20, 2019 Autoinflammatory Arthritis Day