What are solstics and aquinoxes?

Answer 1

On a solstice, the sun is at either the highest point (summer) or the lowest point (winter) that it will ever be in the sky for an observer. On an equinox, the length of the night is equal in time to the length of the day (there is as much light during the day as their is darkness).

Answer 2

solistice refers to sun standing still or reaching the zenith point whereas equinox refers to equal day & equal knight