when is the equinox in march which date ???
These occurs twice each year, around 20 March and 23 September.The equinoxes are the times when the sun is exactly is overhead on the Equator. The Sun crosses the Equator moving northward at the March equinox and moving southward at the September equinox. When it is spring in North hemisphere, it is called Vernal. When the equinox in autumn in September, it is autumnal.