I came across this idea in a book on sacred geometry and adapted it to our calendar year.
The outer ring is a traditional 365 day Gregorian calendar year, with lunar cycles, seasons and zodiac signs. The inner arrangement is a 3 season, 9 cycle Enneagram planner for annual resolutions / goals.
The Enneagram is a system to help break down your goals, schedule an intricate timeline & keep expectations in check. For a full project breakdown, follow the URL. Cheers.
https://www.behance.net/gallery/59434463/Nonagon-Calendar-2018