You need following files in this dir:
day1.png
day2.png
day3.png
day4.png
day5.png
day6.png
day7.png
day8.png
day9.png
day10.png
day11.png
day12.png
day13.png
day14.png
day15.png
day16.png
day17.png
day18.png
day19.png
day20.png
day21.png
day22.png
day23.png
day24.png

Each should be an icon for the day - at least 48x48 pixel of size, biggers get scaled down to 48x48.
I used 8 different ones and used each three times. Feel free to google your own icons for it :)
