Wikipedia:Selected anniversaries/April 15
April 15: Father Damien Day in Hawaii; Birthday of the Great Leader in North Korea; 300th birthday of Leonhard Euler
- 1755 - A Dictionary of the English Language by Samuel Johnson (pictured) was first published.
- 1912 - The passenger liner RMS Titanic sank two hours and forty minutes after colliding with an iceberg.
- 1947 - Jackie Robinson, the first African American to break the baseball color line, played his first game in Major League Baseball.
- 1986 - U.S. armed forces launched Operation El Dorado Canyon against Libya.
- 1989 - The Hillsborough disaster, one of the biggest tragedies of European football, occurred.