April 4 is the 94th day of the year. There are 271 days remaining until the end of the year. This date is slightly more likely to fall on a Monday, Wednesday or Saturday (58 in 400 years each) than on Thursday or Friday (57), and slightly less likely to occur on a Tuesday or Sunday (56).
+ 1812 – United States President James Madison enacts a ninety-day embargo on trade with the United Kingdom.
+ 1818 – The United States Congress adopts the flag of the United States with 13 red and white stripes and one star for each state (then 20).
+ 1850 – Los Angeles is incorporated as a city.
+ 1964 – The Beatles occupy the top five positions on the Billboard Hot 100 pop chart.
+ 1968 – Martin Luther King Jr. is assassinated by James Earl Ray at a motel in Memphis, Tennessee.
+ 1968 – Apollo program: NASA launches Apollo 6.
+ 1983 – Space Shuttle Challenger makes its maiden voyage into space.
+ 1924 – Gil Hodges, American baseball player and manager (d. 1972)
+ 1931 – James Dickens, English politician (d. 2013)
+ 1944 – Craig T. Nelson, American actor, director, producer, and screenwriter
+ 1965 – Robert Downey Jr., American actor, producer, and screenwriter
+ 1973 – David Blaine, American magician and producer