The first day of autumn is in 2018 on September 22 . It is also called the autumnal equinox, fall equinox or the beginning of autumn. Autumn is one of the four temperate seasons, the transition period between summer and winter usually in September when the arrival of night becomes noticeably earlier.
We have placed a detailed description of this event on this page: Autumnal equinox 2017. For further information please stop by there!