May 2, 2017 Yom Ha'atzmaut
May 2, 2017 World Tuna Day
May 3, 2017 World Press Freedom Day
May 4, 2017 Kent State Shootings Remembrance
May 4, 2017 National Day of Prayer
May 4, 2017 Rhode Island Independence Day
May 5, 2017 Cinco de Mayo
May 5, 2017 Kentucky Oaks
May 6, 2017 Kentucky Derby
May 6, 2017 National Nurses Day
May 6, 2017 National Explosive Ordnance Disposal (EOD) Day
May 8, 2017 Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War
May 8, 2017 World Ovarian Cancer Day
May 8, 2017 Victory in Europe Day
May 10, 2017 Day of Vesak
May 10, 2017 Confederate Memorial Day
May 10, 2017 Confederate Memorial Day
May 12, 2017 International Nurses Day
May 12, 2017 Native American Day
May 12, 2017 Military Spouse Appreciation Day
May 13, 2017 World Migratory Bird Day
May 14, 2017 Mother's Day
May 15, 2017 International Day of Families
May 15, 2017 Peace Officers Memorial Day
May 17, 2017 World Information Society Day
May 19, 2017 National Defense Transportation Day
May 20, 2017 World Autoimmune Arthritis Day
May 20, 2017 Armed Forces Day
May 20, 2017 Preakness Stakes
May 21, 2017 World Day for Cultural Diversity for Dialogue and Development
May 22, 2017 International Day for Biological Diversity
May 22, 2017 National Maritime Day
May 22, 2017 Harvey Milk Day
May 23, 2017 International Day to End Obstetric Fistula
May 24, 2017 Emergency Medical Services for Children Day
May 25, 2017 Ascension Day
May 25, 2017 African Liberation Day
May 25, 2017 National Missing Children's Day
May 27, 2017 Ramadan starts
May 29, 2017 International Day of United Nations Peacekeepers
May 29, 2017 Memorial Day
May 29, 2017 Jefferson Davis' Birthday
May 31, 2017 World No Tobacco Day