The main idea is to make better use of natural daylight. Daylight Saving Time is when we move our clocks ahead by one hour in the summer and then back again in the fall. You'll see equinoxes’ dates, and times, all set for your local time.Īs you can see, each time zone listed above contains the word "daylight". Just open the search window in the app and type "Equinox". If you want to know exactly when the event will happen where you live, try the Sky Tonight app. Pacific Daylight Time/PDT (GMT -7): autumnal equinox occurs on September 22, 11:50 p.m.Mountain Daylight Time/MDT (GMT -6): autumnal equinox occurs on September 23, 12:50 a.m.Central Daylight Time/CDT (GMT -5): autumnal equinox occurs on September 23, 1:50 a.m.Eastern Daylight Time (GMT -4): autumnal equinox occurs on September 23, 2:50 a.m.The exact time for your location depends on your time zone. ![]() In the Southern Hemisphere, the autumnal equinox takes place on March 20, 2024, at 03:07 GMT (March 19, 10:07 p.m. In the Northern Hemisphere, the autumnal equinox takes place on September 23, 2023, at 06:50 GMT (02:50 a.m. It aligns with the Gregorian calendar and employs consistent dates to evenly divide a year into four quarters. This approach relies on yearly temperature patterns. It suggests that autumn begins on September 1 (or March 1 in the southern latitudes). There is another method of determining the seasons - meteorological. Keep in mind that the dates mentioned are based on Greenwich Mean Time (GMT), and the equinox date might differ in various time zones. On March 21, it occurs only twice, and the remaining 20 times, it takes place on March 19. ![]() Throughout the 21st century, March 20 will be the most common equinox day, happening 78 times. There, the specific date of the autumnal equinox can change between March 19 and 21. ![]() In the Southern Hemisphere, the start of fall will be on March 20, 2024, at 03:07 GMT (March 19, 10:07 p.m. The next September 24 equinox won't come until 2303. September 23 is the date for the other 22 times. In the 21st century, September 22 is the most common first day of fall, happening 76 times, while September 21 only occurs twice. But this date is not fixed and can vary from year to year, falling anywhere from September 21 to 24. When is the first day of fall?īased on the astronomical method of determining the seasons, autumnal equinox marks the beginning of fall. The hemisphere will keep tilting away until it reaches the farthest point from the Sun at the winter solstice. This leads to fewer daylight hours there, with the Sun rising later and setting earlier. Once the autumnal equinox happens, the relevant hemisphere (the northern one in September and the southern one in March) is tilting away from the Sun. There are two equinoxes a year - spring and autumnal ones. The ecliptic and the celestial equator, inclined at 23.5°, intersect at the moment of the equinox. As a result, the Sun stays right above the equator, giving both hemispheres almost the same amount of sunlight. What is the autumn equinox?Įquinoxes happen when the Earth’s hemispheres aren’t tilted towards or away from the Sun. People from different parts of our planet celebrate this day with different traditions and festivals. In astronomy, the autumnal equinox marks the change of seasons - the end of summer and the beginning of fall. In the Southern Hemisphere, it will occur on March 20, 2024, at 03:07 GMT (March 19, 10:07 p.m. In the Northern Hemisphere, the closest autumnal equinox will take place on September 23, 2023, at 06:50 GMT (02:50 a.m. The autumnal equinox (as well as spring equinox) is the moment when neither of the Earth’s hemispheres is inclined towards or away from the Sun.
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