In what can only be described as a poor marketing move, here are some recommendations for other mathsy advent calendars around the internet.

• For teachers and students, and anyone else really, the wonderful NRICH produce two advent calendars of great activity ideas – one for Primary and one for Secondary.
• Friend of the site and Chalkdust honcho Matthew Scroggs produces an advent calendar of torturous puzzles on his website. In last year’s calendar, each day had a number puzzle and there was an overall logic puzzle connecting them all. We can’t wait to see what happens this year!
• Based on a daft suggestion, I made this printable calendar a few years ago, which assuming you open the correct window each day maintains complete accuracy and also the appropriate level of excitement (there’s an exclamation mark behind each window), which is all you can ask for really.
• For the ultimate binary advent calendar, check isitchristmas.com every day in December. It’s either Christmas or it isn’t.

This post is part of the Aperiodical’s 2018 Aperiodvent Calendar.