It forebodes by two weeks the end of the [Gregorian calendar] year.
There are many births, deaths, historical events, holidays and observances listed at the Wikipedia link, below:
December 17 1979 was a Monday.
December 17 1975 was on a Wednesday.
Hee Haw - 1969 1977-12-17 was released on: USA: 17 December 1977 USA: 17 December 1977 USA: 17 December 1977 USA: 17 December 1977
December 17 1949 was on a Saturday.
December 17, 1946 fell on a Tuesday.
December 17, 2007 was a Monday.
December 17 1943 was a Friday.
December 17 2010 was a Friday.
December 17 1775 was a Sunday.
December 17, 1966 was a Saturday.
The Hobbit There and Back Again - 2014 was released on: South Korea: December 2014 France: 10 December 2014 Netherlands: 10 December 2014 Norway: 10 December 2014 UK: 12 December 2014 Singapore: 16 December 2014 Belgium: 17 December 2014 Denmark: 17 December 2014 Hong Kong: 17 December 2014 Italy: 17 December 2014 Japan: 17 December 2014 Peru: 17 December 2014 Sweden: 17 December 2014 USA: 17 December 2014 Chile: 18 December 2014 Greece: 18 December 2014 Lithuania: 19 December 2014 Romania: 19 December 2014 Iceland: 26 December 2014 Argentina: 1 January 2015
December 17, 1946 fell on a Tuesday.