Today is the Autumn Equinox - a day when there are exactly 12 hours of dark and 12 hours of light, officially marking the first day of autumn in the Northern Hemisphere.
In the United States, however, it's known as the "fall" season - a word that also originated in Britain, but which has fallen out of favour in this country.
The older of the two words is autumn, which first came into English in the 1300s from the Latin word "autumnus". It quickly replaced the term "harvest", which had previously been used to describe the season, because it was the time when crops were usually harvested.
However, in poetry and literature, many writers used the phrase "the fall of the leaves" to describe the season. This was shortened to fall in the 1600s.
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