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Autumnal Equinox 2024
- Sunday, September 22
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Learn when and why the autumnal equinox marks the start of autumn in the Northern Hemisphere. Find out about the Harvest Moon, day length, foliage, and more.
Sep 22, 2022 · Don Ryan/AP. Fall starts at 9 p.m. ET Thursday, a day officially known as the autumn equinox. Both equinoxes and solstices only happen twice a year — the first days of fall and spring are...
- Fall 2024 Dates
- Alternative Fall Start Dates
- Dwindling Daylight Around The Fall Equinox
- Equal Day and Night?
- Equilux
- Falling Temperatures
- Traditions and Folklore
- Fall Months
- How Long Is Fall?
- Fall Or Autumn?
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According to the astronomical definition, fall begins with the autumnal equinox. In the Northern Hemisphere, it's the September equinox; south of the equator, it is the equinox in March. What is an equinox? Equinoxes and solstices in your city
Meteorologists use a different method of defining the first day of fall. And, in some countries, the beginning of the seasons is determined by average temperaturesrather than fixed dates or astronomical events. Meteorological and other seasons definitions
In most locations on Earth—except for tropical regions—the start of fall is accompanied by rapidly shortening days. At any given location, the day-to-day difference in day length is greatest around the days of the equinoxes. After the fall equinox, days still get shorter, but at an ever-decreasing rate. On the shortest day of the year, the winter s...
Astronomical fall begins on the day of the equinox. The name of the event derives from Latin and means equal night, giving the impression that both day and night are exactly 12 hours long. However, that is not entirely true. In most regions, the day of the equinox is a bit longer than 12 hours.
The date when day and night are actually equal is called the equilux. It falls a few days before the spring equinox and some days after the fall equinoxin both hemispheres. Other astronomical terms & definitions
In the temperate zone, in particular, fall is also the time when the warm, stable weather of summer gives way to colder, more erratic weatherconditions, though this varies substantially from one region to another. Climate and monthly average temperatures in your city
The start of autumn and the fall equinox are celebrated in cultures and religions around the world with various fall traditions, holidays, and festivals. Fall festivals: Mabon, Navaratri, and the Snake of Light
In the Northern Hemisphere, astronomical and meteorological autumn runs from September to December. South of the equator, it starts in March and ends in June. Read more about the history and meaningof the fall months:
The Earth does not move at a constant speed in its elliptical (oval) orbit, so the seasons are not of equal length. On average, fall lasts for 89.8 days in the Northern Hemisphere and 92.8 daysin the Southern Hemisphere. Average season lengths: 1. March equinox to June solstice: 92.8 days 2. June solstice to September equinox: 93.6 days 3. Septembe...
Both fall and autumn are correct English terms for the season preceding winter. Autumn is primarily used in British English, while fall is a term more frequently used in American English. Topics: Astronomy, Seasons, September, March, Equinox
Find out when the first day of fall is in 2024, depending on the astronomical or meteorological definition. Learn about the equinox, the equilux, the fall months, and the fall festivals around the world.
Apr 19, 2024 · The autumnal equinox marks the first day of fall in the Northern Hemisphere, when the Sun crosses the celestial equator going south. Learn more about the astronomical and seasonal significance of this event, as well as its cultural and religious aspects.
- The Editors of Encyclopaedia Britannica
Sep 21, 2023 · The autumnal equinox marks the start of fall in the Northern Hemisphere, when day and night are almost equal. In 2023, it falls on Sept. 23 at 2:50 a.m. ET. Learn more about the astronomical and meteorological seasons, the harvest moon and the equinox.
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Sep 19, 2023 · Learn when and why the autumnal equinox marks the official start of fall in the Northern Hemisphere. Find out how day and night are equal, what happens at the poles and how to enjoy the changing seasons.
Sep 23, 2023 · Learn about the fall equinox, the astronomical start of the fall season, and its traditions and celebrations around the world. Find out when the first day of fall is in 2023 and how to enjoy the autumnal equinox.
