All calculatorsAbout UsContact UsPrivacy PolicyTerms & Conditions

Solstice & Equinox Calculator

Find the date of the next solstice or equinox.

Next

—

What this calculator does

This online calculator finds the next solstice or equinox — the four seasonal turning points of the year — from any date, using typical calendar dates for the Northern Hemisphere.

Worked example

Counting from September 3, 2026, the next seasonal turning point is theSeptember Equinox on Tuesday, September 22, 2026.

Common mistakes

  • Assuming the same date and season worldwide. The Southern Hemisphere experiences the opposite season at each solstice and equinox — the June solstice is winter's start there, not summer's.
  • Expecting exact-second precision. This calculator gives the typical calendar date; the precise time varies by time zone and year.

Frequently asked questions

What is the difference between a solstice and an equinox?+

A solstice marks the longest or shortest day of the year (June and December), while an equinox marks a day of roughly equal daylight and night (March and September).

Why are these dates only approximate?+

The exact moment of a solstice or equinox depends on the precise tilt of the Earth's axis relative to the sun and can shift by up to a day or two from year to year — this calculator uses typical calendar dates accurate to within about a day.

Do solstices and equinoxes happen on the same date every year?+

No — because a calendar year isn't an exact number of days, the exact date can shift by a day depending on the year and time zone.

When is the next solstice or equinox?+

It depends on today's date — solstices fall in June and December, and equinoxes fall in March and September. Enter any date above and this calculator finds the next one for you along with a day countdown.

Related calculators

Timestamp ConverterConvert between Unix timestamps and dates.Zodiac Sign CalculatorFind your Western zodiac sign by birth date. Chinese Zodiac CalculatorFind your Chinese zodiac animal and element.Moon Phase CalculatorFind the approximate moon phase for any date.