The September equinox will mark the start of astronomical autumn in the northern hemisphere in 2026, according to the information available.
An equinox is used to identify a seasonal change in the astronomical calendar. In the northern hemisphere, the September equinox signals the beginning of astronomical autumn.
The available material does not specify the exact date or time of the 2026 equinox, nor does it provide further details about what occurs during the event. The seasonal change described applies to the northern hemisphere.
