What does the old imperial calendar mean?

1. The old imperial calendar used to be called "calendar day", "constitutional book" and "general book". It arranges the year, month and day according to a certain calendar, and provides books about taboos. It has a history of 1000 years in China. In the feudal imperial era, people also called it "imperial calendar" because it was promulgated by the emperor.

2. What is recorded in the Imperial Calendar is mainly the calendar of that year. After this year, a new calendar will be replaced. However, since the calendars were all given by the emperor, it is obvious that the old calendars should be carefully preserved. So everyone called the old calendar "old" and called it "old imperial calendar".

The "old imperial calendar" is not suitable for Chinese New Year. Therefore, "old imperial calendar" gradually evolved into a derogatory term to refer to conservative thoughts and behaviors.