Ziwei perpetual calendar and the old yellow calendar should be different when they get married.

They adopt different methods of choosing a day.

A hundred schools of thought contend, so it's different.

In the perpetual calendar, ten thousand years means a long time span, but it doesn't really mean ten thousand years. However, the time recorded in the perpetual calendar is still longer than that in the yellow calendar, which contains at least 100 calendar such as Gregorian calendar, lunar calendar and Tibetan calendar, as well as information related to good or bad luck, holidays and reminders. The yellow calendar is generally printed and published in years, and it can also display the Gregorian calendar and the lunar calendar.