What's the difference between the lunar calendar and the solar calendar?

The solar calendar, also known as the solar calendar, is a calendar based on the movement cycle of the earth around the sun. The Gregorian calendar year is approximately equal to the tropic year, one year 12 months. This "month" has nothing to do with the first lunar month. This is now widely used in the world. Because it originated in the west, it was only introduced to China during the Revolution of 1911, so it is also called the new calendar.

Lunar calendar is one of the traditional calendars in China, also known as lunar calendar, ancient calendar, Han calendar, yellow calendar, summer calendar and old calendar. In astronomy, the lunar calendar mainly refers to the calendar arranged according to the phase cycle of the moon, in which the moon revolves around the earth once (based on the sun, the actual moon runs for more than one week) as January, that is, the first month of the lunar calendar is used as the basis for determining the calendar month, and a year is a calendar of twelve months.

The lunar calendar in China is a typical lunar calendar. Yin-Yang calendar is a calendar that takes into account the cycle of the moon's movement around the earth and the cycle of the earth's movement around the sun. The average length of the Yin-Yang calendar is close to the first month of the lunar calendar, and the average length of each calendar year is close to the tropic year, which is a calendar of "Yin-Yang Year". It can not only make each year basically conform to the seasonal changes, but also make the date of each month correspond to the month. Its disadvantage is that the length of the calendar year varies greatly, and the calendar system is complex, which is not conducive to memory.