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View all articles →Find astronomical equinoxes and solstices and distinguish them from meteorological seasons.
Choose inputs and calculate to see your result.
Equinoxes and solstices are solved as solar-longitude events. Their UTC instants are converted to the selected city, and intervals between successive events give astronomical season lengths. Meteorological seasons are a separate convention.
Astronomy Engine 2.1.19 calculations, not direct observations. Rise/set uses the upper limb with standard refraction and a sea-level observer; terrain and local weather are not modeled.
Results are astronomical estimates, not a guarantee of visibility or a substitute for safe observation.
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