2017-12-19
Perl
Perl 6 Advent Calendar
Perl 6 Advent: 19 - December - 2017 - Raku Advent Calendar (2009-2019)
Perl Advent Calendar
Perl Advent: Perl Advent Calendar 2017 - Maybe not
Mojolicious Advent Calendar
Mojolicious Advent: appears to be unavailable on 2017-12-19. Please try again later.
PHP
PHP Security Advent Calendar
PHP Security Advent: Clean Code - Developer First - Sonar
Go
Gopher Academy
Go Advent: Advent 2017 - Gopher Academy Blog
Ruby
PlanetRuby Advent Calendar
PlanetRuby Advent 2017: appears to be unavailable on 2017-12-19. Please try again later.
Qiita: Ruby
Qiita Ruby Advent 2017: Ruby Advent Calendar 2017 - Qiita
Qiita: Ruby on Rails
Qiita Ruby on Rails Advent 2017: Ruby on Rails Advent Calendar 2017 - Qiita
Java
JVM Advent
JVM Advent:: December 19, 2017 - JVM Advent
Miscellaneous
SysAdvent
24Ways Advent
24 Ways to impress your friends: Articles from advent 2017 * 24 ways
Performance Calendar
Performance Planet: Web Performance Calendar -- 2017
Advent of Code
Advent of Code: Day 19 - Advent of Code 2017
Interesting Things
Hubble Space Telescope Advent
Hubble Space Telescope Advent: 2017 Hubble Space Telescope Advent Calendar - The Atlantic
Plus Magazine (Math)
Plus Magazine Advent: The Plus advent calendar 2017 - plus.maths.org