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

Gregorian calendar is the Gregorian calendar, which is the universal date in the world, which is our usual date.

Lunar calendar is the lunar calendar, which is the date used for farming in ancient China, that is, the date indicated by the small print below the calendar.

2, the algorithm is different:

The solar calendar is a calendar in which the earth revolves around the sun for one year. The lunar calendar takes the lunar (moon) as a month and 12 months as a year (13 months in leap years). (Adjust four hours in a year according to leap month)