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countries in the Northern Hemisphere, autumn traditionally starts with the September equinox (21 to 24 September) and ends with the winter solstice (21 or 22 December). In the United States, Labor Day (the first Monday in September) is often informally treated as the end of summer and start of autumn; certain summer traditions, such as wearing white, may be frowned upon after that date. As daytime and nighttime temperatures decrease, trees change colour and

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