Fall Equinox 2024. So, when is the autumnal equinox in 2024? According to the farmers almanac, the first day of fall is sunday, sept.
The fall equinox specifically marks the midpoint between the summer solstice in june, when northern hemisphere days are their longest (up to 24 hours without the sun setting in the polar. Fall equinox in the northern hemisphere is in september, and it marks a welcome shift in the seasons for many folks after a long, hot summer.