Start Of Autumn 2024. There are 20 days until autumn 2024 next autumn will be on september 1, 2024 ( today (august 12, 2024) is 2 weeks and 6 days before september. 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.
In 2024, autumn (or fall) will begin: * the dates of fall.