This Day That Year

December 17

in History

First Saturnalia Celebrated — Rome turns the world upside down for a week
RomeAncient
497

First Saturnalia Celebrated

Rome turns the world upside down for a week

In ancient Rome, the first Saturnalia festival was celebrated in honor of the god Saturn. The holiday turned Roman social conventions on their head: slaves dined with masters, gambling was permitted, and gifts were exchanged in a carnival atmosphere. The week-long festival, held near the winter solstice, became Rome's most popular celebration and influenced the traditions of Christmas itself.

497 BC
Mary Cartwright Born — She found chaos before chaos was cool
Aynho, Northamptonshire, EnglandEarly 20th Century
1900

Mary Cartwright Born

She found chaos before chaos was cool

In Aynho, Northamptonshire, Mary Cartwright was born with a mathematical mind that would pioneer what later became known as chaos theory. Working with J. E. Littlewood, she identified the unpredictable behavior in differential equations that would later be recognized as the butterfly effect. She became one of Britain's most distinguished mathematicians and was made a Dame Commander of the Order of the British Empire.

1900 AD
World War II — World War II: Battle of the Bulge: Malmedy massacre: American 285th Field Artillery Observation Battalion POWs are.
Early 20th Century
1944

World War II

World War II: Battle of the Bulge: Malmedy massacre: American 285th Field Artillery Observation Battalion POWs are.

World War II: Battle of the Bulge: Malmedy massacre: American 285th Field Artillery Observation Battalion POWs are shot by Waffen-SS Kampfgruppe Joachim Peiper.

1944 AD