EarthCal

From Stonehenge to the Mayan Calendar, from the Roman Empire to Indigenous peoples, societies grew rich and resilient by sinking with cycles up in the sky and down on earth. Now you can follow their example! Using EarthCal, sync your events, cycles and tasks with not just the normal solar year days and months, but also with the phases of the Moon and of Venus, the migration of whales and of the cariboo, the spin of Saturn and of Mars... and more!

EarthCal is based on the theory of Earthen ethics by Angway and Maier. In particular their outline of cyclocentric cultures in chapter five: https://book.earthen.io/en/kincentric.html and the account of Walter Scott in his 1959 essay William Henry Scott, Some Calendars of Northern Luzon.