What was the auspicious day of the ancient ecliptic when the project started?

An auspicious day is an auspicious day when superstitious people think they can do things. In the past, astrology was used to calculate good or bad luck. It is said that Qinglong, Tang Ming, Jingui, Tiande, Yutang and Siming are auspicious gods. When they were on duty on the sixth day, everything was all right, and they didn't avoid bad luck. This day was called "auspicious day of the ecliptic". Generally refers to a good day to do things.