Fall equinox
Tuesday, September 22, 2026
22:30 (Asia/Tehran)
Days start growing shorter than nights in the north; spring begins in the south.
Seasons & Sun
Tīrān
Fall equinox
54 days away
Next event
Upcoming events
Fall equinox
Tuesday, September 22, 2026
22:30 (Asia/Tehran)
Winter solstice
Monday, December 21, 2026
18:30 (Asia/Tehran)
144 days away
Spring equinox
Saturday, March 20, 2027
12:30 (Asia/Tehran)
233 days away
Summer solstice
Monday, June 21, 2027
07:30 (Asia/Tehran)
326 days away
Fall equinox
Wednesday, September 22, 2027
22:30 (Asia/Tehran)
419 days away
Winter solstice
Tuesday, December 21, 2027
18:30 (Asia/Tehran)
509 days away
Equinoxes
Day and night are nearly equal length worldwide. The Sun crosses the celestial equator — a key marker for seasonal change.
Solstices
The Sun reaches its northernmost or southernmost point in the sky. These are the longest and shortest days of the year.
Your hemisphere
Dates are shown in your local timezone. Season names reflect the Northern Hemisphere — the same astronomical event marks opposite seasons south of the equator.