What does the lunar calendar refer to?

The combined calendar of yin and yang refers to the lunar calendar, which is a traditional calendar in China. It is also known as the summer calendar, Chinese calendar, Han calendar and Chinese calendar. In the lunar calendar, the change period of the moon phase, that is, the length of the moon, plus the "24 solar terms" component of the dry calendar, takes the length of the tropical year of the sun as the year. By setting leap months, the average calendar year adapts to the tropic year.

Therefore, the lunar calendar is a calendar based on the summer calendar and integrated with the solar calendar. The lunar calendar does not consider the movement of the earth around the sun, and can not reflect seasonal changes, but can reflect tidal phenomena, which is a guide to guiding maritime activities in ancient times.

Introduction to calendar

Calendar is a method to calculate time according to the astronomical phenomena in order to meet the needs of people's daily life. The calendar based on the moon's orbit around the earth is called the lunar calendar; A calendar made according to the position change of the sun in different seasons is called the solar calendar. The calendar in China has two common names: Gregorian calendar and Lunar calendar (there are 13 months in leap years, because the moon orbits the earth 13 times a year).

According to the classification standard, the lunar calendar corresponds to the solar calendar. Plus the lunar calendar, there are only three calendars. No calendar in the world can jump out of the classification of these three calendars. The Gregorian calendar (new calendar) prevailing in the world is actually a solar calendar, while the lunar calendar (old calendar) of China's traditional calendar belongs to a yin-yang calendar.