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   When is the September equinox?

   • In the Southern Hemisphere—that is, anywhere south of Earth’s equator—the September equinox happens in spring. In contrast, it occurs in autumn in the Northern Hemisphere. Understanding an equinox will help you understand why it occurs twice a year and at different times and how it relates to other astronomical events, like solstices.

   What are the Equinoxes and Solstices - Equinox World

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   When is the equinox in the northern hemisphere?

   • In the Northern Hemisphere the autumnal equinox falls about September 22 or 23, as the Sun crosses the celestial equator going south. In the Southern Hemisphere the equinox occurs on March 20 or 21, when the Sun moves north across the celestial equator. What causes the seasons?

   Autumnal equinox | Definition, Dates, & Facts | Britannica

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   When is the vernal equinox?

   • The vernal equinox, which occurs around March 20th in the Northern Hemisphere and September 23rd in the Southern Hemisphere, marks the start of spring. On the other hand, the autumnal equinox, which occurs around September 22nd in the Northern Hemisphere and March 20th in the Southern Hemisphere, marks the start of fall.

   Relationship Between Equinoxes and the Changing Seasons

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   When do equinoxes occur?

   • The equinoxes occur around March 20 and September 22 each year, corresponding to an equal length of day and night. The Earth tilts on its axis so that the sun shines directly over the equator on these days. The equinoxes, or “equal nights,” happen twice a year: around March 20 and September 21. Equinox comes from Latin, meaning “equal night.”

   Solstices and Equinoxes [Dates and Times] - Equinox World

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2. equinoxworld.org › solstices-and-equinoxes-dateSolstices and Equinoxes [Dates and Times] - Equinox World

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   Jun 22, 2024 · The equinoxes, or “equal nights,” happen twice a year: around March 20 and September 21. Equinox comes from Latin, meaning “equal night.” The two equinoxes occur in March and September; the two solstices occur in June and December.

3. www.britannica.com › science › autumnal-equinoxAutumnal equinox | Definition, Dates, & Facts | Britannica

   www.britannica.com › science › autumnal-equinox

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   Jun 25, 2024 · In the Northern Hemisphere the autumnal equinox falls about September 22 or 23, as the Sun crosses the celestial equator going south. In the Southern Hemisphere the equinox occurs on March 20 or 21, when the Sun moves north across the celestial equator.

   • Author: The Editors of Encyclopaedia Britannica

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5. www.britannica.com › science › summer-solstice-astronomySummer solstice | Definition & Facts | Britannica

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   Jun 28, 2024 · According to the astronomical definition of the seasons, the summer solstice also marks the beginning of summer, which lasts until the autumnal equinox (September 22 or 23 in the Northern Hemisphere, or March 20 or 21 in the Southern Hemisphere).

   • Author: The Editors of Encyclopaedia Britannica

6. equinoxworld.org › what-are-the-equinoxes-andWhat are the Equinoxes and Solstices - Equinox World

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   Jun 21, 2024 · The September equinox, also called the autumnal equinox, takes place on September 22nd. The equinox occurs when the sun crosses the celestial equator and marks the point where day and night are equal.

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     What is the autumnal equinox?

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     When is the September Equinox? | Autumn Equinox 2020

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8. gmauthority.com › blog › 2024Here's When 2025 Chevy Equinox EV Production Is Scheduled

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   2 days ago · GM has scheduled the launch of the 2025 Chevy Equinox EV production for Monday, August 26th, 2024. As always with production plans, this date is tentative until the first units roll off the ...

9. www.britannica.com › science › winter-solsticeWinter solstice | Definition & Diagrams | Britannica

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   Jun 20, 2024 · According to the astronomical definition of the seasons, the winter solstice also marks the beginning of the season of winter, which lasts until the vernal equinox (March 20 or 21 in the Northern Hemisphere, or September 22 or 23 in the Southern Hemisphere).

10. equinoxworld.org › relationship-between-equinoxesRelationship Between Equinoxes and the Changing Seasons

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    Jun 22, 2024 · There are two types of equinoxes: the vernal (spring) equinox and the autumnal (fall) equinox. The vernal equinox, which occurs around March 20th in the Northern Hemisphere and September 23rd in the Southern Hemisphere, marks the start of spring.