Summer is about to officially come to an end. In just 96 hours, autumn will begin, bringing relief from the long and intense heat that has marked the past three months. Astronomical calculations confirm that this year’s summer began on June 21 and lasted for exactly 92 days, 39 hours, and 37 minutes. The transition will take place on Monday, September 22, when autumn begins its run of nearly 90 days before winter takes over in December.
The change of seasons is marked by the autumnal equinox, an important astronomical event that occurs when the sun’s rays strike directly over the equator. On this day, daylight and night hours are nearly equal all over the world. From then on, the sun appears to move gradually southward, causing days to shorten and nights to lengthen in the northern hemisphere, while the opposite occurs in the southern hemisphere where spring begins.
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