Those dates can vary by a day or two each year, but this year are September 22 though December 21,” she says. “Astronomical fall is essentially the time period from the autumnal equinox up to the winter solstice. Fall officially begins on the autumn equinox.īut there are actually two measures of the seasons: “the astronomical seasons” (which follow the arrivals of equinoxes and solstices) and what’s called the “meteorological seasons.”Īllison Chinchar, CNN meteorologist, explains the differences: Is the autumn equinox the official first day of fall? You can click here to see more cities (rounded down by one minute and adjusted for Daylight Saving Time). Thursday, September 23, while Singapore and Hong Kong clock in at 3:21 a.m. Going farther east, Dubai marks the exact event at 11:21 p.m.Īs we move even farther eastward into Asia, we end up switching days. Out West in Los Angeles and Vancouver, that means it arrives at 12:21 p.m.įor residents of Madrid, Berlin and Cairo, it comes precisely at 9:21 p.m. More on that farther down in the article.īut first, here are the answers to your other fall equinox questions:įor people in places such as Toronto and Washington, DC, that’s 3:21 p.m. There’s a good explanation (SCIENCE!) for why you don’t get precisely 12 hours of daylight on the equinox. Well, there’s just one rub - it isn’t as perfectly “equal” as you may have been told. They have long, dark winters and then have summers where night barely intrudes.īut during equinoxes, everyone from pole to pole gets to enjoy a 12-hour split of day and night. But people close to the poles, in destinations such as the northern parts of Canada, Norway and Russia, go through wild swings in the day/night ratio each year. For people south of the equator, this equinox actually signals the coming of spring.įolks really close to the equator have roughly 12-hour days and 12-hour nights all year long, so they won’t really notice a thing. If you reside in the Northern Hemisphere, you know it as the fall equinox (or autumnal equinox). On Wednesday, September 22, we enter our second and final equinox of 2021. ![]() Twice a year, everyone on Earth is seemingly on equal footing - at least when it comes to the distribution of light and dark.
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