Wikipedia:Selected anniversaries/December 24
- 1777 - Christmas Island, the oldest atoll in the world, was discovered by Captain James Cook.
- 1865 - Confederate veterans founded the Ku Klux Klan, a white supremacist group.
- 1906 - Reginald Fessenden transmitted the first radio broadcast ever.
- 1914 - British and German soldiers interrupted World War I to celebrate Christmas, beginning the Christmas truce.
- 1974 - Cyclone Tracy destroyed most of Darwin, Australia.
Recent days: December 23 – December 22 – December 21