What is the relationship between auspicious day and ecliptic plane?

The auspicious day of the zodiac is a unique term in the traditional calendar of China, which refers to a day when everything goes well. China people have a tradition of observing astronomical phenomena and measuring good and bad luck. Since Oracle Bone Inscriptions, there have been records about divination. The ecliptic plane refers to the orbital plane of the earth revolving around the sun, and the intersection angle with the equatorial plane of the earth is 23 26'. The great circle where the ecliptic plane intersects the celestial sphere is called the ecliptic. So there is no connection between the two.

The ecliptic is an ancient astronomical vocabulary. It means the trajectory of the earth around the sun. It was not until western priests introduced astronomy to China that the zodiac was known to everyone.