On this day, March 21…

2006: Twitter is established with the sending of the first tweet by co-founder Jack Dorsey, who writes: “just setting up my twttr.”

Also on this day:

1556: Thomas Cranmer, the former Archbishop of Canterbury, is burned at the stake for heresy.

Thomas Cranmer, the former Archbishop of Canterbury, is burned at the stake for heresy. 1685: Johann Sebastian Bach is born in Eisenach, Germany.

Johann Sebastian Bach is born in Eisenach, Germany. 1925: Tennessee Gov. Austin Peay signs the Butler Act, which prohibits the teaching of the Theory of Evolution in public schools. (Tennessee would repeal the law in 1967.)

Tennessee Gov. Austin Peay signs the Butler Act, which prohibits the teaching of the Theory of Evolution in public schools. (Tennessee would repeal the law in 1967.) 1935: Persia officially changes its name to Iran.

Persia officially changes its name to Iran. 1946: The recently created United Nations Security Council sets up temporary headquarters at Hunter College in the Bronx, New York.

The recently created United Nations Security Council sets up temporary headquarters at Hunter College in the Bronx, New York. 1952: The Moondog Coronation Ball, considered the first rock and roll concert, takes place at Cleveland Arena.

The Moondog Coronation Ball, considered the first rock and roll concert, takes place at Cleveland Arena. 1957: President Dwight D. Eisenhower and British Prime Minister Harold Macmillan begin a four-day conference in Bermuda.