13 moon calendar
From Wikipedia, the free encyclopedia
The 13 Moon Calendar is based on a simple, natural rhythm of 13 Moons of 28 Days + a Day Out of Time for global celebration of Peace Through Culture. The 13 Moon 28 Day Count sprung up as a measure of natural time in cultures as geographically diverse as the Inca, the Ancient Egyptians, the Druids, the ancient Hebrews, the Babylonians, and the Polynesians.
The Lakota Indians for example, followed the passing of each moon cycle, by observing the turtle, whose 13 central plates represent the 13 Moons in each yearly cycle. The 28 outer plates along the edge of its shell represent the 28 Days in each Moon.