When does fall start in 2025? Key dates and what to expect this autumn

Autumn is just weeks away, bringing cooler temperatures, cozy sweaters and a kaleidoscope of colors.

Mark your calendars for Monday, Sept. 22 — the official first day of fall. At 2:19 p.m., we’ll experience the autumnal equinox. But what exactly does that mean?

There are two equinoxes each year, and autumn’s marks the beginning of fall. Think of it as Mother Nature’s way of hitting the reset button.

The Earth’s position relative to the sun creates an almost perfect balance between day and night, according to the Farmer’s Almanac . The other equinox occurs in the spring and is called the vernal equinox .

After the autumnal equinox, days become shorter as the sun continues to rise later and nightfall arrives earlier. This leads up to the winter solstice, after which the days start