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

The differences between lunar calendar and solar calendar are as follows:

The lunar calendar is not a solar calendar. Usually the lunar calendar is the lunar calendar, but in fact the lunar calendar is different from the lunar calendar. The lunar calendar determines the month according to the cycle of the first month of the lunar calendar, and makes the average length of a year close to the year of the return of the sun by placing boudoir. It is also called summer calendar and Han calendar.

Lunar calendar is a calendar used in parallel with Gregorian calendar in China at present. Although people are used to calling it the "lunar calendar", it is actually a kind of lunar calendar, not a lunar calendar based on the moon phase cycle. Except Tomb-Sweeping Day, which is based on the "Tomb-Sweeping Day" in the twenty-four solar terms of the lunar calendar, other traditional festivals in China are based on the lunar calendar. Up to now, most countries and ethnic groups in the cultural circle of Chinese characters still celebrate traditional festivals of the lunar calendar, such as Spring Festival, Dragon Boat Festival, Mid-Autumn Festival and Double Ninth Festival.