How many main types of calendars are there?

The calendar is a method of calculating time using time units such as years, months, and days.

There are 3 main types of calendars: the solar calendar, the lunar calendar and the yin-yang calendar.

China was one of the first countries to invent the calendar, and its emergence had a certain impact on the development of our economy, culture.

The lunar calendar is one of the traditional calendars in China, which belongs to the yin and yang calendars.