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When is the equinox in the northern hemisphere?
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Jun 25, 2024 · Learn about the autumnal equinox, when the Sun crosses the celestial equator going south and day and night are of equal length. Find out when it occurs in the Northern and Southern Hemispheres, and how it relates to the seasons and the zodiac.
- The Editors of Encyclopaedia Britannica
Learn when the fall equinox or autumnal equinox occurs in the Northern and Southern Hemispheres, and how it marks the start of the season. Find out how fall is defined by astronomers, meteorologists, and cultures around the world.
In the northern hemisphere, the vernal equinox (March) conventionally marks the beginning of spring in most cultures and is considered the start of the New Year in the Assyrian calendar, Hindu, and the Persian or Iranian calendars, while the autumnal equinox (September) marks the beginning of autumn.
In the Northern Hemisphere, the March equinox is also known as the spring or vernal equinox; the September equinox can be called the fall or autumnal equinox. In the Southern Hemisphere, the names are the other way around.
The equinox may be taken to mark the end of astronomical summer and the beginning of astronomical autumn (autumnal equinox) in the Northern Hemisphere, while marking the end of astronomical winter and the start of astronomical spring (vernal equinox) in the Southern Hemisphere.
Sep 18, 2017 · Learn about the fall equinox, also called the autumnal equinox, when day and night are of nearly equal length across the planet. Discover how ancient and modern cultures celebrate this harvest season with rituals, festivals and myths.
Learn about the September equinox, when the Sun crosses the celestial equator from north to south, and the start of fall in the Northern Hemisphere. Find out the date, time, and facts of this astronomical event and how it affects day and night around the world.
