Why does Buddhism use the lunar calendar instead of India to set summer?

Summer settlement: In India, the rainy season in summer lasts for three months. The Buddha designated April 16 to July 15 as the period of stability. During this period, monks are forbidden to go out and live in one place for intensive practice, which is called settlement. During the rainy season, plants, insects and ants breed the most, and they are not allowed to go out for fear of making mistakes and hurting creatures and being laughed at by the world.

Buddhism is now a native Buddhism. It's not quite the same as Indian Buddhism, because when it was introduced to China, it had to conform to many times, such as time, date, folk customs and people's understanding, and it had to change constantly. At that time, almost all people in China were officials, and only a few were officials. At that time, people were farmers except businessmen, and it took farmers about time to plow the fields. The lunar calendar was tailor-made for farmers. At that time, the main calendar was the lunar calendar. The current Gregorian calendar is actually a calendar from the west, which is made of what they call "Almighty God", so at that time, Sunday was also called Sunday, which was a day to worship their God regularly, and it is still called this in many rural areas now. People's livelihood, seasons, festivals and solar terms are all different, so the lunar calendar is used instead of the Indian calendar, but my personal view is that the time to settle down in summer depends on the climate, with the aim of reducing accidental injuries and improving practice.

China and India have different geographical locations and different climates.

The specific time of Buddha's meditation in summer depends on the climate. The lunar calendar is closely related to the climate in China, so it is more appropriate to adopt the lunar calendar in China.