Autumnal Equinox Day 2024 India. In 2024, the autumnal equinox will take. Spring equinox 20 march, summer solstice 21 june, autumn equinox 22 september, winter solstice 21 december.

The dates for equinoxes and solstices in the northern and southern hemispheres are the same, but in opposite seasons. The autumnal equinox occurs when the sun crosses the celestial equator, an imaginary line that extends from the earth’s equator into space.