Question

Which geographical term is used to describe the dates when days and nights are of equal duration?

Answer 1

Equal amount of sunlight is received in the northern and southern hemisphere when the sun is vertically over the equator.The apparent position of the sun during the earths revolution will be over the equator on march 21 ans September 23 hence the length of day and night will be equal during these days on both hemispheres .

Equinoxes