Wikipedia:Selected anniversaries/December 21
December 21: Winter Solstice Celebrations begin at sunset in the Northern Hemisphere (2007).
- 69 – Vespasian became the fourth Roman Emperor in the Year of the Four Emperors.
- 1844 – The Rochdale Pioneers, usually considered the first successful cooperative enterprise, opened their store in Rochdale, England, and formed the basis for the modern cooperative movement.
- 1937 – The animated feature film Snow White and the Seven Dwarfs, based on the fairy tale Snow White by the Brothers Grimm, premiered to a widely receptive audience.
- 1962 – Rondane National Park (pictured), Norway's first national park, was established.
- 1988 – Pan Am Flight 103: A terrorist bomb exploded and destroyed a Boeing 747 over Lockerbie, Scotland, killing 270, including 11 on the ground.
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