Solstice & Equinox Calculator

Understanding Solstices & Equinoxes

Solstices and equinoxes mark the astronomical beginning of seasons. The summer solstice has the longest day, winter solstice the shortest, while equinoxes have nearly equal day and night.

These events are reversed between hemispheres - when it's summer solstice in the north, it's winter solstice in the south.