The lunar phase is a vital indicator of the area of life being affected on a day to day basis yet thousands of years ago the Mayan civilisation had its own method of interpreting the energy of each day - one of several sophisticated calendar systems, the tzolkin has 13 tones/numbers making a 'trecena' and 20 day signs.

A 260 day perpetual calendar which is still followed in meso america and which has spawned a modern day version known as the Dreamspell.