These are the advent and holiday calendars I found this year:
- 24 ways to impress your friends
- 24 Pull Requests – Giving back little gifts of code for Christmas
- UXmas – An advent calendar for UX folk
- FastMail Advent 2016
- Perl Advent Calendar 2016
- Advent Calendar 2016 by Jens Grochtdreis
There is no Webkrauts Adventskalender this year, but there is a German version of the advent calendar by Jens:
If you know any interesting holiday or advent calendars, please post them in the comments.