efterårsjevndøgn

efterårsjevndøgn marks the beginning of autumn in the Northern Hemisphere. This astronomical event occurs annually around September 22nd or 23rd, when the sun crosses the celestial equator moving southward. On this day, the length of day and night are nearly equal across the globe, hence the name "jevndøgn" which translates to "equal night." Following the autumnal equinox, the Northern Hemisphere begins to tilt further away from the sun, resulting in shorter days and longer nights as winter approaches.

The autumnal equinox has been observed and celebrated by various cultures throughout history. Many ancient traditions and festivals are associated with this time of year, often reflecting themes of harvest, gratitude, and the transition into a period of rest and introspection. In some cultures, it signifies the end of the agricultural season and the gathering of crops before the onset of colder weather. The changing colors of the leaves and the cooler temperatures are also distinct characteristics of this seasonal shift. The exact timing of efterårsjevndøgn varies slightly each year due to the Earth's elliptical orbit and the Gregorian calendar's leap year system.