December 17 is the 351st day of the year
It is also Sweetmorn, The Aftermath 59, 3184 YOLD (discordian)
And let us not forget 13.0.6.1.7 by the Mayan Long Count

It's 12-17 and though I've dealt with 12 several times, and 17 also, I've never yet looked at 1217 as a number or year. 1217, the year, brought the death of Eustace the Monk. As a youth he went to Toledo, Spain, to study the black arts and became such an accomplished student and practitioner of Black Magic, that he was quite famous locally. Naturally, he then became a Benedictine Monk and eventually the seneschal and bailiff for the count of Boulogne who outlawed him over some malfeasance. He retaliated by burning some of the count's mills and beating feet. It was then that he became a pirate in the English Channel, also working at times as a mercenary or privateer for the French or the English, depending upon the circumstances. He warred upon France for King John of England off and on, and took control of the Channel Islands, but he also raided the English coast for which he was outlawed by King John. John eventually pardoned him because he needed his services, however. Eustace eventually changed sides (surprise!) and warred upon England on behalf of France. When the English civil war of 1215 broke out, he supported the rebels and also conveyed Prince Louis of France to England to assist them. He was captured in battle in 1217 and immediately executed by his captors.
1217 is a prime and that's about it.

Twenty years of schooling and they put you on the day shift, look out kid, ...

On this day in history:

497 BC – The first Saturnalia festival was celebrated in ancient Rome. This is one of the holidays that Christianity tried to coopt and supplant/replace with xmas
1538 – Pope Paul III excommunicated Henry VIII, thereby creating the Church of England, the Episcopalians and sundry other types of Anglicans.
1819 – Simón Bolívar declared the independence of Gran Colombia
1862 – Ulysses S. Grant expelled the Jews from parts of Tennessee, Mississippi, and Kentucky.
1903 – The Wright brothers make the first controlled powered, heavier-than-air flight
1938 – Otto Hahn discovered the nuclear fission of Uranium.
1969 – The US Air Force closed its study of UFOs. Or did it???
1989 – Fernando Collor de Mello became Brazil's first democratically elected President in almost 30 years.
2010 – Mohamed Bouazizi set himself on fire, triggering the Tunisian Revolution.

Born this day in:

1706 – Émilie du Châtelet, philosopher, mathematician, author, and physicist
1778 – Humphry Davy, chemist and physicist
1797 – Joseph Henry, physicist and engineer with a magnetic personality
1807 – John Greenleaf Whittier, poet and activist.
1853 – Pierre Paul Émile Roux, physician, bacteriologist, immunologist and co-founder of the Pasteur Institute.
1873 – Ford Madox Ford, novelist, poet, critic and editor.
1884 – Alison Uttley, author of children's books
1894 – Arthur Fiedler, railway condustor
1900 – Mary Cartwright, mathematician early analyst of chaotic systems
1903 – Erskine Caldwell, author
1903 – Ray Noble, bandleader, composer and actor
1904 – Paul Cadmus, controversial painter and illustrator
1908 – Willard Libby, chemist, helped develop radiocarbon dating
1910 – Sy Oliver, singer, songwriter, arranger, composer, trumpeter, and bandleader
1916 – Penelope Fitzgerald, novelist, poet and essayist
1920 – Kenneth E. Iverson, computer scientist, developed APL
1929 – William Safire, journalist
1936 – Tommy Steele, singer, guitarist, and actor
1937 – Art Neville, singer and keyboard player
1939 – James Booker, "the best black, gay, one-eyed junkie piano genius New Orleans has ever produced."
1939 – Eddie Kendricks, singer and songwriter
1941 – Dave Dee, of Dave Dee, Dozy, Beaky, Mick & Tich.
1942 – Paul Butterfield, singer and harmonica player
1949 – Paul Rodgers, singer, songwriter and producer
1958 – Mike Mills, multi-instrumentalist, singer, songwriter, and producer

Died this day in:

1273 – Rumi, jurist, theologian, and poet
1830 – Simón Bolívar, general, revolutionary, and politician
1940 – Alicia Boole Stott, mathematician
1957 – Dorothy L. Sayers, author playwright and poet
1964 – Victor Francis Hess, physicist, discoverer of cosmic rays
1978 – Don Ellis, trumpet player, composer, and bandleader
1999 – Grover Washington Jr., singer, songwriter, and saxophonist
2005 – Jack Anderson, journalist
2010 – Captain Beefheart, singer and songwriter
2016 – Henry Heimlich, doctor

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Holidays, Holy Days, Festivals, Feast Days, Days of Recognition, and such:

International Day to End Violence Against Sex Workers
Pan American Aviation Day (United States)
Wright Brothers Day, a United States federal observance by Presidential proclamation

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Music goes here, iirc, well,

Otto Hahn

Ray Noble

Sy Oliver

Tommy Steele

Art Neville

James Booker

Eddie Kendricks

Paul Butterfield

Paul Rodgers

Mike Mills

Don Ellis

Grover Washington Jr

Captain Beefheart

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Whatever you may think of them, keep in mind that sex workers are human beings, entitled to the same rights, privileges and protections as everybody else.

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Image is A Benedictine Monk

It's an open thread, so do your thing