Seasonal Change Calculator
Calculate the exact dates of equinoxes and solstices. Find when each season begins and ends.
Astronomical Events 2026
March Equinox
Friday, March 20, 2026 at 02:40 PM
June Solstice
Sunday, June 21, 2026 at 08:23 AM
September Equinox
Wednesday, September 23, 2026 at 12:13 AM
December Solstice
Monday, December 21, 2026 at 08:53 PM
Spring
Mar 20
93 days
Summer
Jun 21
94 days
Autumn
Sep 23
90 days
Winter
Dec 21
89 days
Season Durations
Spring
93 days
Summer
94 days
Autumn
90 days
Winter
89 days
Note: Astronomical seasons are based on Earth position relative to the Sun. Meteorological seasons follow the calendar months (Dec-Feb winter, Mar-May spring, etc.).