Microsoft is founded as a partnership between Bill Gates and Paul Allen in Albuquerque, New Mexico. Date: April 4, 1975 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1975 📅 On This Day (Today)

Southern Airways Flight 242 crashes in New Hope, Paulding County, Georgia, killing 72. Date: April 4, 1977 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1977 📅 On This Day (Today)

Prime Minister Zulfikar Ali Bhutto of Pakistan is executed. Date: April 4, 1979 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1979 📅 On This Day (Today)

Iran–Iraq War: The Islamic Republic of Iran Air Force mounts an attack on H-3 Airbase and destroys about 50 Iraqi aircraft. Date: April 4, 1981 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1981 📅 On This Day (Today)

Space Shuttle program: Space Shuttle Challenger makes its maiden voyage into space on STS-6. Date: April 4, 1983 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1983 📅 On This Day (Today)

President Ronald Reagan calls for an international ban on chemical weapons. Date: April 4, 1984 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1984 📅 On This Day (Today)

Governor Evan Mecham of Arizona is convicted in his impeachment trial and removed from office. Date: April 4, 1988 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1988 📅 On This Day (Today)

The current flag of Hong Kong is adopted for post-colonial Hong Kong during the Third Session of the Seventh National People's Congress. Date: April 4, 1990 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1990 📅 On This Day (Today)

Forty-one people are taken hostage inside a Good Guys! Electronics store in Sacramento, California. Three of the hostage takers and three hostages are killed. Date: April 4, 1991 Read more on Wikipedia → 📅 Other events on April 4 📅 Events on this day in 1991 📅 On This Day (Today)