When Is The Autumn Equinox 2025 In India. This page provides date and time for vernal equinox in the year 2025 for kolkata, west bengal, india. Autumn equinox 2025 (beginning of astronomical autumn) on the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator,.

Spring equinox 20 march, summer solstice 21 june, autumn equinox 22 september, winter solstice 21 december. The march equinox refers to the time when the northern hemisphere slowly starts to tilt.