Why is the yellow calendar of 9 1 different from the old one?

This is due to the differences in the basis, methods and bibliography of auspicious choice.

Gregorian calendar is the best carrier for choosing auspicious days. In order to facilitate people to choose auspicious days, the contents of choosing auspicious days in the past were all compiled by the state, so the conclusion of choosing auspicious days is the same.

After the founding of People's Republic of China (PRC), China's calendar was compiled by the state, but the state did not compile some auspicious contents. Before the reform and opening up, the calendar did not list auspicious content; After the reform and opening up, various publishing houses have included the contents of auspicious elections in their calendars. Because each publishing house organizes its own personnel to compile the contents of Auspicious Selection, and because of their different basis, methods and bibliography, different conclusions of Auspicious Selection are bound to be drawn.