The first day of fall is officially here as the autumnal equinox marks the change of the seasons.
WASHINGTON — Fall is officially here as the autumnal equinox marks the change of the season in the Northern Hemisphere.
The fall equinox happens each September and marks the official astronomical start of autumn. In 2026, the equinox arrives on Tuesday, Sept. 22 at 8:04 p.m. Eastern Time.
When is the first day of fall?
The first day of fall is on Tuesday, Sept. 22, 2026, in the Northern Hemisphere.

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