First Day of Fall 2010 Date in USA: When Is It?

When is the first day of fall or autumn in the United States, the 22nd of September or 23rd of September?
Fall supposedly gets underway with the autumnal equinox, the date in September when hours of day and night are roughly equal. Can anyone tell me when exactly the first day of fall 2010 is in the US?

asked by Square in Science | 3847 views | 09-20-2010 at 02:12 PM

The first day of fall starts on the Equinox - September 22rd for 2010, and ends on the Winter Solstice, December 21st 2010.
The moment of the beginning of Fall (over the northern hemisphere) is the moment when the Sun's position in the sky passes directly overhead on the equator, heading southward. Likewise when it happens during the Sun's apparent northward trek it marks the beginning of spring over the northern hemisphere.
All the countries in the Northern Hemisphere such as United States, Canada and Europe, can expect the fall to start on 22nd September this year, Wednesday. The countries in the Southern Hemisphere such as Australia, Antarctica, South America and some parts of Africa, experienced their first day of fall in March.

answered by Hand | 09-20-2010 at 02:13 PM

According to the website USA.gov, the first day of Fall (Autumn) is Wednesday September 22, 2010 at 11:09 PM ET.
On the Autumnal Equinox, the length of day and night is nearly, but not exactly, equal, according to TimeandDate.com. After Wednesday, we will have fewer hours of daylight and longer evenings.

answered by Monique | 09-22-2010 at 06:04 PM

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