What is an old almanac?

In the old calendar: A doesn't open a warehouse to dissipate property, doesn't eat dogs and doesn't go to bed, which means:

The first sentence is don't do something at a certain time of the day, or something will happen. If A does not open a position, the attribute will be scattered, that is, if A opens a position, the attribute will be scattered. Don't eat dog meat at noon (19-2 1) or you will easily get into trouble in bed. Or don't eat dog meat on the same day or at that time; Don't eat dog meat every day, or something strange will happen.

The old yellow calendar is a perpetual calendar. The perpetual calendar is the oldest solar calendar in ancient legends of China. A perpetual calendar is an annual calendar that records the dates of specific solar and lunar calendars within a certain time range (such as 100 years or more), which is convenient for people in need to query and use. Ten thousand years is just a symbol, indicating a long time span. ?

The perpetual calendar used is an almanac that contains or is suitable for several years [2]. Modern perpetual calendars can display various calendars such as solar calendar, lunar calendar, and dry calendar at the same time, and can also contain various functional information such as good or bad luck, holidays, reminders, etc., which is very convenient for people to query and use.