Does the vernal equinox belong to spring? What about the solstice in summer? Is the division of seasons based on the solar calendar or the lunar calendar?

The vernal equinox belongs to spring and the summer solstice belongs to summer. The division of seasons in China is calculated according to the lunar calendar, that is, the lunar calendar.

The vernal equinox is the midpoint of 90 days in spring and one of the 24 solar terms. Every year on the fifth day of the second lunar month (about March 20-2 1 in Gregorian calendar), when the sun is at 0 (vernal equinox) of the yellow meridian.

Summer solstice is also one of the 24 solar terms, which occurs on June 2 1 or 22 of the Gregorian calendar every year. On the solstice in summer, the direct sunlight from the sun reaches the northernmost part of the year and almost directly reaches the Tropic of Cancer. At this time, the day in the northern hemisphere is the longest, and the farther north it is, the longer it is.

Seasons are several time periods, among which the geographical landscape that appears periodically every year is very different. Different regions have different seasons. For temperate climate, especially in China, a year is divided into four seasons, namely, spring, summer, autumn and winter.