Sorry for any confusion.
The back of these pages (on the physical version) contain the rules reprinted. It wasn't until we were done that we decided to create reference pages at the beginning of the Calendar. Then we removed them for the PDF to try to save printing space.
The back of Jan 1st contains the 1st rules page : dice, dice rolls, Character Stats, Choices, Resolving events.
The back of Jan 13th has the rules: Combat, Ability Reminders, once per rest, once per day, pick pocket.
The back of Jan 14th has the rules: Dealing with death and rest.
The back of Jan 15th has the rules: Level Up, Characters, Shops.