Algorithm of auspicious day of the ecliptic

Recording the year, month and day with heavenly stems and earthly branches is a unique method in China. This kind of calendar, that is, the lunar calendar still in use today, is mostly recorded in the almanac, that is, the imperial calendar in the past.

In the old "imperial calendar", in addition to recording the date, another word 12 was added to the date to become a formula. Even when it was built, it was dark (the underworld). In addition to danger, it can be developed and opened (the ecliptic), but it can't be closed (the underworld). In this way, every day is artificially divided into "good day" and "bad day". This is a feudal superstition that binds people's thoughts and behaviors and makes people obey the emperor's calendar.

In our real life, trains, ships, planes and cars are moving every day, tall buildings are being built every day, and people are going to work every day. They never stop driving, building or staying at home because of unlucky dates. If today's business is losing money because the day is chosen on the "underworld", isn't the profitable party on the same day and at the same time? What is the explanation? It can be seen that such statements as "auspicious days in the ecliptic" and "fierce days in the underworld" are all lies.