Autumnal Equinox Marks Start Of Fall 2026
The autumnal equinox, signaling the official start of fall, will occur on Tuesday, September 22, 2026, at 8:04 p.m. ET, as reported by The Old Farmer's Almanac. This astronomical event happens when the sun crosses the celestial equator, resulting in nearly equal lengths of day and night. As fall approaches, cooler temperatures, colorful foliage, and shorter days are expected. In Boston, sunsets past 7 p.m. have already ended for the year, and the last sunset past 6 p.m. will occur on October 16, 2026. Daylight saving time will end on November 1, 2026, at 2 a.m. local time, marking a shift to standard time and an earlier sunset. The Northern Hemisphere transitions into autumn, while the Southern Hemisphere welcomes spring.