1890– The first–ever official County Championship match begins. Yorkshire beat Gloucestershire by eight wickets at Bristol. George Ulyett scores the first century in the competition.
1978– In Zaire, rebels occupy the city of Kolwezi, the mining center of the province of Shaba. The government of Zaire asks the U.S., France and Belgium to restore order.
1990– As the previous claim of Shigechiyo Izumi is no longer considered, Jeanne Calment is already considered to have become the oldest–recorded human ever on this date, more than five years earlier than previously thought.
1998– Four students are shot at Trisakti University in Indonesia, leading to widespread riots and the resignation, on May 21, of President Suharto, who had ruled the country for over 30 years.
2015– A magnitude 7.3 earthquake hits Nepal, two weeks after one of slightly higher magnitude had killed over 8,000 people. Casualties are reported in Nepal, India, China and Bangladesh.