What's the big difference between auspicious days on the ecliptic and auspicious days on the Gregorian calendar?

The yellow calendar is also called the imperial calendar, which is named after the court's public promulgation. This is a calendar for one year.

The ecliptic refers to the earth's orbit around the sun, which lasts for one year. The position of the earth in orbit corresponds to which day of the year. An auspicious day of the zodiac is an auspicious day of the year.