What do you mean by opening a column?

Opening columns in the Gregorian calendar refers to the work of doing columns. The "yi" and "taboo" in the yellow calendar refer to what is suitable and not suitable for this day. The yellow calendar, also known as the old yellow calendar, the imperial calendar and the children's calendar, etc. , is a kind of almanac that can display various calendars such as solar calendar, lunar calendar and official calendar at the same time, and has a large number of rules and contents related to seeking good fortune and avoiding evil.

The main contents of the Gregorian calendar include: twenty-four solar terms, avoiding bad luck, rushing evil, combining evil, radio, dry branches, twelve gods, on duty, fetal gods, stars, moon phases, evil spirits, jealousy of Peng Zu, six splendors, nine planets, fleeting time, traditional Chinese medicine, mysterious nine planets, weeks, zodiac signs, directions and so on. Almanac is a code of conduct followed by ancient emperors and a calendar promulgated by emperors, so people call it "imperial calendar"; After the Revolution of 1911, the imperial system was overthrown and the "imperial calendar" was rewritten as the "yellow calendar".