I could be wrong, but isn't this the Solar Seasons from China? https://en.wikipedia.org/wiki/Solar_term https://en.wikipedia.org/wiki/Solar_term Though I would

I could be wrong, but isn't this the Solar Seasons from China? https://en.wikipedia.org/wiki/Solar_term https://en.wikipedia.org/wiki/Solar_term Though I would not be surprised as it has been very interesting to see Japan and Korea preserving many of the traditional east Asian cultures a lot better than China itself.