The first crossword puzzle by Arthur Wynne is published in the New York World.
Tag: 21 December
21 December 1832
Egyptian forces defeat Ottoman troops in what became known as the Battle of Konya.
21 December 1969
The United Nations adopts the Convention on the Elimination of All Forms of Racial Discrimination.
21 December 1988
A bomb explodes on board Pan Am flight 103 over Lockerbie in Scotland, killing all 270 on board.