Earth from orbit on the September equinox, as viewed by EUMETSAT. Notice how the line between day and night - the terminator - touches both the north and south poles. More at http://bit.ly/earthequinox Image credit: NASA/Robert Simmon
September Equinox occurs this year on September 22, at 19:21 UTC (or 3:21 pm EDT/ 12:21 pmPDT).
Equinox is the moment when the Sun shines directly on the Earth's equator and lights up the Northern and Southern Hemispheres equally. This equinox marks the beginning of the fall season in the Northern Hemisphere, and the spring season in the Southern Hemisphere.
More about this equinox at Earthsky.
Date: Wednesday, September 22, 2021
Time: 12:21 p.m. - 12:22 p.m.