Black oxide is a finish applied to iron and steel. There is also a ' black oxide' process applied to the copper inner layers of printed circuit boards, but that is another topic.
Since Fall begins at the end of September (usually September 22nd) and ends at the end of December (usually December 21st), it seems much more logical to say that October through December are considered Fall months instead of September through November. Views.
Quick Answer. In North America, the fall season starts around September 22 and ends around December 21. Each year the exact date of the beginning and end of fall changes, but the dates are generally around those times.