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Equinox. A solar equinox is a moment in time when the Sun crosses the Earth's equator, which is to say, appears directly above the equator, rather than north or south of the equator. On the day of the equinox, the Sun appears to rise "due east" and set "due west". This occurs twice each year, around 20 March and 23 September.
The March equinox is known as the vernal equinox (spring equinox) in the Northern Hemisphere and as the autumnal equinox (autumn equinox or fall equinox) in the Southern Hemisphere. [8] [7] [10] On the Gregorian calendar, the northward equinox can occur as early as 19 March or as late as 21 March at 0° longitude.
The September equinox (or southward equinox) is the moment when the Sun appears to cross the celestial equator, heading southward. Because of differences between the calendar year and the tropical year, the September equinox may occur from September 21 to 24. At the equinox, the Sun as viewed from the equator rises due east and sets due west.
What Time Is the Fall Equinox 2023? The autumnal equinox will arrive at 2:50 a.m. Eastern Time. The equinox occurs at the exact same moment across the world. But because of varying time zones ...
The peak time is Sept. 10, less than two weeks before the fall equinox on Sept. 22. This article originally appeared on Treasure Coast Newspapers: Fall equinox 2024 arrives Sept. 22. Here is the ...
Astronomical fall starts on the autumnal equinox, between Sept. 21 and Sept. 23, and ends on the winter solstice, between Dec. 20 and Dec. 22. These dates vary from year to year due to leap years ...
The Earth will experience its second equinox of the year on September 22 — marking the first official day of fall.
The winter solstice, also called the hibernal solstice, occurs when either of Earth 's poles reaches its maximum tilt away from the Sun. This happens twice yearly, once in each hemisphere (Northern and Southern). For that hemisphere, the winter solstice is the day with the shortest period of daylight and longest night of the year, and when the ...