The days are depicted in two ways:
1) On a “regular” calendar grid in a wheel beneath the rings. The rainbow backround signifies the chakra correlation of each day of the week and,
2) As color coded rays expanding outward from the center. The first day of the month is a thicker ray & also will have the name of the month next to it around the circle.
The idea is to shift from linear depiction to the spiral view of time.