Clear, accurate, and useful—just remember to specify which hemisphere you're in!

For many, fall isn't defined by a date on a map, but by specific lifestyle shifts. In the United States and Canada, "Cultural Fall" typically begins immediately after Labor Day (the first Monday in September) and lasts until Thanksgiving. Key markers of this season include: what months are considered fall

Meteorologists and climatologists divide the year into four equal three-month periods to make record-keeping easier. For them, fall is always exactly three months long. September, October, and November. Start Date: September 1. End Date: November 30. 2. Astronomical Fall: The "Official" Calendar Clear, accurate, and useful—just remember to specify which