May 1, 2016 Orthodox Easter
May 2, 2016 Orthodox Easter Monday
May 3, 2016 World Press Freedom Day
May 3, 2016 Primary Election Day
May 4, 2016 Kent State Shootings Remembrance
May 4, 2016 Rhode Island Independence Day
May 5, 2016 Ascension Day
May 5, 2016 Isra and Mi'raj
May 5, 2016 Cinco de Mayo
May 5, 2016 National Day of Prayer
May 6, 2016 Kentucky Oaks
May 6, 2016 National Nurses Day
May 6, 2016 Military Spouse Appreciation Day
May 7, 2016 Kentucky Derby
May 7, 2016 National Explosive Ordnance Disposal (EOD) Day
May 8, 2016 Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War
May 8, 2016 World Ovarian Cancer Day
May 8, 2016 Victory in Europe Day
May 9, 2016 Truman Day observed
May 10, 2016 Confederate Memorial Day
May 10, 2016 Confederate Memorial Day
May 10, 2016 Primary Election Day
May 12, 2016 Yom Ha'atzmaut
May 12, 2016 International Nurses Day
May 13, 2016 Friday the 13th
May 13, 2016 Native American Day
May 14, 2016 World Migratory Bird Day
May 15, 2016 International Day of Families
May 15, 2016 Peace Officers Memorial Day
May 17, 2016 World Information Society Day
May 20, 2016 Day of Vesak
May 20, 2016 World Autoimmune Arthritis Day
May 20, 2016 National Defense Transportation Day
May 21, 2016 World Day for Cultural Diversity for Dialogue and Development
May 21, 2016 Armed Forces Day
May 21, 2016 Preakness Stakes
May 22, 2016 Trinity Sunday
May 22, 2016 International Day for Biological Diversity
May 22, 2016 National Maritime Day
May 22, 2016 Harvey Milk Day
May 23, 2016 International Day to End Obstetric Fistula
May 25, 2016 African Liberation Day
May 25, 2016 Emergency Medical Services for Children Day
May 25, 2016 National Missing Children's Day
May 26, 2016 Corpus Christi
May 29, 2016 International Day of United Nations Peacekeepers
May 30, 2016 Memorial Day
May 30, 2016 Jefferson Davis' Birthday
May 31, 2016 World No Tobacco Day