In calendar date calculation you have the option of storing your Major System images 00-99 in seven different memory palaces to avoid calculating the step for the year code.
Each of these palaces then represents a number between 0 - 6 (Sun, Mon, etc.) and for each palace you’d use a location that reminds you of that particular day. For example, Sunday reminds you of relaxing in your garden and Monday reminds you of the office.
Unlike a regular palace you are not really interested in traversing the information in each of the palaces. All you wan’t to know is the location that you’ve placed a particular number, to then determine which of the seven palaces you’re in:
EDIT: I’ve written a separate post about the concept of Memory Palace Reverse Lookup here: