The difference between vernal equinox, autumnal equinox, summer solstice, east solstice and spring, autumn, summer and winter

The spring equinox, autumnal equinox, summer solstice, and winter solstice are called solar terms, and they are one day each. Specifically speaking, these two solstices have specific times, which can be specific to a certain hour, minute and second of the day. However, they are generally considered to be one day each.

The vernal equinox is usually on March 21

The autumnal equinox is usually on June 22

The summer solstice is usually on September 23

Spring, autumn, summer and winter are called seasons, each lasting three months and about 91 days.

Spring is generally March, April, and May in the Gregorian calendar

Autumn is generally June, July, and August in the Gregorian calendar

Summer is generally September, October, and November Month

Winter is generally December, January, and February of the Gregorian calendar

The two to two months are generally in the middle of their corresponding seasons.

The vernal equinox is in spring, the summer solstice is in summer, the autumnal equinox is in autumn, and the winter solstice is in winter.