What are the classifications of calendars?

Calendars are divided into lunar calendar, solar calendar and yin-yang calendar.

1. The lunar calendar is one of the traditional calendars in China and the original calendar in ancient countries. Calendars based on the apparent movement of the moon are called lunar calendars, also known as lunar calendars, lunar calendars, ancient calendars, yellow calendars, summer calendars and old calendars.

The real lunar calendar is the Islamic calendar. That is, twelve lunar months are a year, regardless of seasonal changes. The lunar calendar is mainly used to guide their religious festivals.

Second, the solar calendar is a calendar based on the movement cycle of the earth around the sun, also known as the solar calendar. The solar calendar is based on the running cycle of the direct point of the sun, and its average calendar year is the tropic year. There are two kinds of calendar years, one is the normal year, the other is the leap year, and the leap year is only one day away from the normal year.

The Gregorian calendar, which is widely used in the world, is the most familiar solar calendar. This calendar is saturated with the civilization created by human beings for thousands of years. It was learned by the ancient Romans from the Egyptians and spread all over the world with the expansion of the Roman Empire and the rise of Christianity.

Third, the lunar calendar refers to the calendar in astronomy that takes into account the relationship among the sun, the moon and the earth. The scientific name of English is the solar calendar. In the lunar calendar, the moon orbits the earth 1 month, but the leap month is set to make the average number of days in a year consistent with the number of days in the tropic of cancer, so this calendar is consistent with the periodic movement of the moon and the earth around the sun.

Extended data:

The origin of the calendar:

The first calendar in China was about 4000 years ago. According to a page of Oracle bone calendar in Oracle Bone Inscriptions, it is proved that the calendar of Yin Dynasty has reached a considerable level. This page of Oracle Bone Inscriptions is the oldest almanac of all mankind, and this page of Oracle Bone Inscriptions is also called the calendar.

Calendars were used in the imperial palace about 65,438+0,000 years ago in Yongzhenyuan Year of Tang Shunzong (AD 805), so they are also called royal calendars. At that time, the calendar was divided into twelve volumes, and the number of pages in each volume was equal to the number of days in each month. On each page, the year, month and date were written and handed over to the emperor's personal example officer. The words and deeds of the emperor are recorded in the blank space of the calendar every day, and are first given to the emperor at the end of each month, and then sent to the historian for filing.

Historians compile a "national history" according to the contents recorded in the calendar and the major events that took place in the imperial court and all parts of China. Later, many officials in the imperial court thought this kind of calendar was good, so they followed suit and compiled calendars for their own use. Then, some people first printed the monthly meeting, solar terms and auspicious days of the ecliptic on the almanac, leaving a large blank for notes.

Calendars have developed into wall calendars, desk calendars and electronic calendars only for nearly a hundred years. Calendars are often decorated with images, and monthly cards are one of the decorative paintings of calendars. Nowadays, they have become indispensable items in people's production and life. Calendars are used to record dates and other related information. One day's information on each page is called a calendar, one month's information is called a monthly calendar, and one year's information is called an annual calendar.

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