What do solar and lunar calendars mean?

The solar calendar is calculated by the sun and the lunar calendar by the moon. The lunar calendar is what we call the national calendar and the lunar calendar. It has been circulating in China for hundreds of years. The solar calendar comes from abroad, commonly known as the Gregorian calendar.

The solar calendar is a calendar designed according to the earth's revolution around the sun, which originated in the west. The return year of revolution is 3 1897 days, so there will be one less day every four years.

The ancient people were weak in observing the sun, but strong in observing the moon. So more places use the lunar calendar, that is, the calendar for calculating the cycle of the moon phase.

Generally speaking, it is divided into big and small months, big month with 30 days and small month with 29 days. The moon orbits the earth once with a period of 29.5306 days. Generally speaking, in the lunar calendar, the night without the moon is designated as 30th and 1 day, and the full moon is15th. Gregorian calendar =24 solar terms × 15 days = 360 days a year; Lunar calendar = 29 days × 12 months = 348 days a year.

Need to know:

1, time is different.

Lunar calendar: The lunar calendar does not consider the earth's revolution around the sun, so the changes of the four seasons in the lunar calendar have no fixed time and cannot reflect the seasons, which is a great shortcoming. In order to overcome this shortcoming, people later decided on a compromise calendar, which is the so-called lunar calendar. The summer calendar (also called lunar calendar) that China is still using now is this kind of lunar calendar.

Like the lunar calendar, it also customizes a month according to the time when the moon is full and short, which is 30 days for the big month and 29 days for the small month. However, it adds leap months to make the average number of days in a year close to the solar calendar, so as to adjust the four seasons. In the summer calendar, there is an extra leap month every two or three years.