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There are only two moments each year when neither pole points toward the Sun, and the Sun lies directly above Earth’s equator. These moments are the equinoxes. The March equinox happens sometime between March 19 and 21. The September equinox occurs sometime between September 21 and 24.
The date of the closest approximation of the equilux varies slightly by latitude; in the mid-latitudes, it occurs a few days before the spring equinox and after the fall equinox in each respective hemisphere.
Learn the basic concept of equinox and solstice and how they are related to the tilt of the earth's axis and its orbit around the sun. Find out the dates of equinoxes and solstices in a year and their effects on day and night lengths.
Jun 22, 2024 · Find out when the equinoxes and solstices occur each year from 2017 to 2036. Learn the meanings and differences of these celestial events and how they affect the seasons and daylight hours.
May 31, 2024 · Learn about the two equinoxes in the year when the Sun is above the Equator and day and night are of equal length. Find out when they occur, how they are measured, and what causes the seasons.
- The Editors of Encyclopaedia Britannica
Oct 19, 2023 · On Earth, there are two equinoxes every year: one around March 21 and another around September 22. Sometimes, the equinoxes are nicknamed the “ vernal equinox ” (spring equinox) and the “ autumnal equinox ” (fall equinox), although these have different dates in the Northern and Southern Hemispheres.
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The first day of winter in the Northern Hemisphere is in December; south of the equator, it is in June. Find out exactly when the winter season starts. At the March equinox, the Sun crosses the equator from south to north. Explanation and 2024 equinox date.
