What are the four seasons and solar terms in the textbook?

There are four seasons and 24 solar terms in a year.

Beginning of spring, spring rain, fright, vernal equinox, Qingming, Grain Rain

Summer is long, summer is full, busy planting, summer solstice, small heat, big heat.

Beginning of autumn, summer heat, white dew, autumnal equinox, cold dew, first frost.

Beginning of winter, light snow, heavy snow, winter solstice, slight cold, severe cold.