when does autumn start in america
Autumn starts in the northern hemisphere on September 22 or 23, depending on the year. In 2008, the autumnal equinox is September 22 at 15:44 UTC (11:44 AM on the east coast of the continential US and 8:44 on the west coast). You can find a chart of times until 2020 at the top right of the Wikipedia article on equinoxes.
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