Alcatraz Federal Penitentiary closes. Date: March 21, 1963 Read more on Wikipedia → 📅 Other events on March 21 📅 Events on this day in 1963 📅 On This Day (Today)

Martin Luther King Jr. leads 3,200 people on the start of the third and finally successful civil rights march from Selma to Montgomery, Alabama. Date: March 21, 1965 Read more on Wikipedia → 📅 Other events on March 21 📅 Events on this day in 1965 📅 On This Day (Today)

Ranger program: NASA launches Ranger 9, the last in a series of uncrewed lunar space probes. Date: March 21, 1965 Read more on Wikipedia → 📅 Other events on March 21 📅 Events on this day in 1965 📅 On This Day (Today)

Battle of Karameh in Jordan between the Israel Defense Forces and the combined forces of the Jordanian Armed Forces and PLO. Date: March 21, 1968 Read more on Wikipedia → 📅 Other events on March 21 📅 Events on this day in 1968 📅 On This Day (Today)

San Diego Comic-Con, the largest pop and culture festival in the world, hosts its inaugural event. Date: March 21, 1970 Read more on Wikipedia → 📅 Other events on March 21 📅 Events on this day in 1970 📅 On This Day (Today)

The first Earth Day proclamation is issued by Joseph Alioto, Mayor of San Francisco. Date: March 21, 1970 Read more on Wikipedia → 📅 Other events on March 21 📅 Events on this day in 1970 📅 On This Day (Today)

Cold War: American President Jimmy Carter announces a United States boycott of the 1980 Summer Olympics in Moscow to protest the Soviet–Afghan War. Date: March 21, 1980 Read more on Wikipedia → 📅 Other events on March 21 📅 Events on this day in 1980 📅 On This Day (Today)

Canadian paraplegic athlete and humanitarian Rick Hansen begins his circumnavigation of the globe in a wheelchair in the name of spinal cord injury medical research. Date: March 21, 1985 Read more on Wikipedia → 📅 Other events on March 21 📅 Events on this day in 1985 📅 On This Day (Today)