How to distinguish lunar calendar from solar calendar

Lunar calendar and solar calendar can be distinguished by looking at the calendar. Generally, solar calendar and lunar calendar are written at the same time. Write numbers in the solar calendar, such as September 12. Writing Chinese characters is the lunar calendar, such as the third day of July. The number of days in the lunar calendar is different from that in the solar calendar. The number of days in the lunar calendar is 354 or 355, while the number of days in the solar calendar is 365 or 366. The days in the solar calendar are longer.

The so-called lunar calendar and solar calendar are two different calendar calculations, and their reference objects are different:

People often say that the lunar calendar is based on the moon. People call the moon's time around the earth "lunar month", and its period is about 29.53 days. For the convenience of conversion, the big month is 30 days and the small month is 29 days.

The solar calendar is based on the sun, and the time for the earth to go around the sun is called the "solar year", which is about 365.25 days. It is divided into 12 months, and each month is about 30.44 days. Because the moon is closer to the earth, it is easy to observe. Therefore, in ancient times, the "lunar calendar" was widely used, such as eight-character fortune telling, marriage, building a house to see the sky, and the old calendar was based on the "lunar calendar".