First Day Autumn 2025. Find out the date when autumn (or fall) is in 2025 and count down the days until autumn (or fall) with a countdown timer. In the southern hemisphere, the start of fall will be on march 20, 2025, at 09:02 gmt (05:02 a.m.
For the year 2024 the meteorological autumn will begin on sunday, september 1, 2024 and will end on saturday, november 30, 2024. When is the autumnal equinox in 2025?