Discovery of the cosmic microwave background radiation by Robert Woodrow Wilson and Arno Penzias. Date: May 20, 1964 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1964 📅 On This Day (Today)
One hundred twenty-one people are killed when Pakistan International Airlines Flight 705 crashes at Cairo International Airport. Date: May 20, 1965 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1965 📅 On This Day (Today)
The Popular Movement of the Revolution political party is established in the Democratic Republic of the Congo. Date: May 20, 1967 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1967 📅 On This Day (Today)
The Battle of Hamburger Hill in Vietnam ends. Date: May 20, 1969 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1969 📅 On This Day (Today)
In the Chuknagar massacre, Pakistani forces massacre thousands, mostly Bengali Hindus. Date: May 20, 1971 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1971 📅 On This Day (Today)
In a referendum in Quebec, the population rejects, with 60% of the vote, a government proposal to move towards independence from Canada. Date: May 20, 1980 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1980 📅 On This Day (Today)
Church Street bombing: A car bomb planted by UMkhonto we Sizwe explodes on Church Street in South Africa's capital, Pretoria, killing 19 people and injuring 217 others. Date: May 20, 1983 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1983 📅 On This Day (Today)
First publications of the discovery of the HIV virus that causes AIDS in the journal Science by a team of French scientists including Françoise Barré-Sinoussi, Jean-Claude Chermann, and Luc Montagnier. Date: May 20, 1983 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1983 📅 On This…
Radio Martí, part of the Voice of America service, begins broadcasting to Cuba. Date: May 20, 1985 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1985 📅 On This Day (Today)
The Chinese authorities declare martial law in the face of pro-democracy demonstrations, setting the scene for the Tiananmen Square massacre. Date: May 20, 1989 Read more on Wikipedia → 📅 Other events on May 20 📅 Events on this day in 1989 📅 On This Day (Today)