Autumn - Wikipedia
https://en.wikipedia.org/wiki/Autumn
Autumn, also known as Fall in American English, is one of the four temperate seasons.Outside the tropics, autumn marks the transition from summer to winter, in September (Northern Hemisphere) or March (Southern Hemisphere), when the duration of daylight becomes noticeably shorter and the temperature cools considerably. Day length decreases and night length increases as the season progresses ...
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