The perpetual calendar is a calendar that records the specific dates of the Gregorian calendar and the lunar calendar within a certain time range. The perpetual calendar is a calendar that records the specific dates of the Gregorian calendar and the lunar calendar within a certain time range (such as 100 years or more). Ten thousand years is just a symbol, indicating a large time span. The perpetual calendar is the oldest solar calendar in Chinese ancient legends. In order to commemorate the achievements of the compilers of the calendar for thousands of years, the calendar was named "Perpetual Calendar".
The Chinese calendar began more than 4000 years ago. The oracle bone calendar is the oldest kind of almanac in the world. The oracle bone calendar is also called the calendar. Calendar classification in calendar:
Lunar calendar: The lunar calendar, also known as the Tailunar calendar, is a calendar arranged according to the phase cycle of the moon. One month is the month when the moon goes around the earth, that is, the new moon is the basis for determining the calendar month, and one year is the calendar of twelve calendar months. One month of the lunar calendar is called "New Moon Watching". In the lunar calendar, when the moon changes from sunny to sunny at different times on the first day of the lunar calendar to the fifteenth day of the lunar calendar, you can only watch the new moon, regardless of the year of return. So it has nothing to do with the seasons.
Ganzhi Calendar: Also known as the solar calendar or the Chinese solar calendar, it is a calendar that uses 60 groups of different heavenly stems and earthly branches to mark the year, month, day and hour. It is mainly composed of four parts: the year, month, day and time of the trunk and branch periods. It governs both the year and the month, and has 24 solar terms.
lunar calendar: It belongs to the Yin Yang calendar, which is based on the summer calendar (lunar calendar) and absorbs the 24 solar terms of the Gan Zhi calendar as a supplementary calendar. Strictly speaking, the traditional calendar in China should not be called the lunar calendar, but the lunar and solar calendar. It is now called the "lunar calendar". The lunar calendar is a combination of the lunar and solar calendar, which covers the movement of the moon and the change of the sun's position.