May 2, 2028 Yom Ha'atzmaut
May 2, 2028 World Tuna Day
May 3, 2028 World Press Freedom Day
May 4, 2028 Kent State Shootings Remembrance
May 4, 2028 National Day of Prayer
May 4, 2028 Rhode Island Independence Day
May 5, 2028 Cinco de Mayo
May 5, 2028 Kentucky Oaks
May 6, 2028 Kentucky Derby
May 6, 2028 National Nurses Day
May 6, 2028 National Explosive Ordnance Disposal (EOD) Day
May 8, 2028 Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War
May 8, 2028 World Ovarian Cancer Day
May 8, 2028 Victory in Europe Day
May 9, 2028 Primary Election Day
May 10, 2028 Confederate Memorial Day
May 10, 2028 Confederate Memorial Day
May 12, 2028 International Nurses Day
May 12, 2028 Native American Day
May 12, 2028 Military Spouse Appreciation Day
May 13, 2028 World Migratory Bird Day
May 14, 2028 Mother's Day
May 15, 2028 International Day of Families
May 15, 2028 Peace Officers Memorial Day
May 17, 2028 World Information Society Day
May 19, 2028 National Defense Transportation Day
May 20, 2028 World Autoimmune
May 20, 2028 Armed Forces Day
May 20, 2028 Preakness Stakes
May 21, 2028 World Day for Cultural Diversity for Dialogue and Development
May 22, 2028 International Day for Biological Diversity
May 22, 2028 National Maritime Day
May 22, 2028 Harvey Milk Day
May 23, 2028 International Day to End Obstetric Fistula
May 24, 2028 Emergency Medical Services for Children Day
May 25, 2028 Ascension Day
May 25, 2028 African Liberation Day
May 25, 2028 National Missing Children's Day
May 29, 2028 International Day of United Nations Peacekeepers
May 29, 2028 Memorial Day
May 29, 2028 Jefferson Davis' Birthday
May 31, 2028 World No Tobacco Day
May 20, 2028 Autoinflammatory Arthritis Day