Infinity flip calendar remix. Flip it back to increase the date/month/day.  

The lids close with a satisfying click. The tiles (dates and months) are printed with 2 contrasting colours. I used a black and white pattern in this make. The first and last 2 layers only (0.40mm). The tiles are numbered for an easy assembly.

For the Days of the week add the color change at layer 4 and at layer 17. 
if you printed the original version, you have to print the modified stand, the days box with lid, and the days tiles, arrange them as follow in the box:
side 1: Mon, Wed, Fri, Sun

side 2: Tue, Thu, Sat