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Equinox & Solstice Calculator

Find the exact equinox and solstice times that mark the four astronomical seasons.

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Astronomical seasons

When do the seasons begin?

Four season markers

2026

Times are UTC. The season names reverse between the Northern and Southern Hemispheres.

March equinoxMar 20, 2026, 2:45 PM UTC
June solsticeJun 21, 2026, 8:25 AM UTC
September equinoxSep 23, 2026, 12:05 AM UTC
December solsticeDec 21, 2026, 8:50 PM UTC

Powered by astronomy-engine, an open-source library.

Three simple steps

How to use it

  1. Choose a calendar year.
  2. See all four season markers in UTC.
  3. Read the hemisphere note before naming the season.

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