Fall 2025 Month. Starting in the fall will allow you to complete a full. Usually, when we talk about the first day of autumn we are referring to the astronomical autumn which is defined by the earth's axis and orbit around the sun.
Find out the autumn (fall) start and end dates for the years 2024, 2025 and 2026. In 2025, the autumnal equinox in the northern hemisphere will occur on september 22nd or 23rd.