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Iranian people celebrate the night of the Northern Hemisphere's winter solstice as, "Yalda night", which is known to be the "longest and darkest night of the year". Yalda night celebration, or as some call it "Shabe Chelleh" ("the 40th night"), is one of the oldest Iranian traditions that has been present in Persian culture from ancient times ...
Winter solstice is the shortest day of year, longest night of the year and the official first day of winter in the Northern Hemisphere. Find out about the science and traditions behind the solstice.
The shortest day of the year will see an early sunset at 3:51pm. ... It also represents the longest night of the year, and the time when the sun is at its lowest daily maximum elevation in the sky ...
For areas north of the equator, this is the shortest day of the entire year, followed by the longest night. In 2024, the winter solstice falls on Dec. 21, 2024, at 4:20 a.m. EST. Astronomical winter
Above 66.56° latitude, there is no sunset at all, a phenomenon referred to as the midnight sun. Solstice day arcs as viewed from 70° latitude. At local noon the winter Sun culminates at −3.44°, and the summer Sun at 43.44°. Said another way, during the winter the Sun does not rise above the horizon, it is the polar night. There will be ...
In late winter and spring, sunrise as seen from temperate latitudes occurs earlier each day, reaching its earliest time shortly before the summer solstice; although the exact date varies by latitude. After this point, the time of sunrise gets later each day, reaching its latest shortly after the winter solstice , also varying by latitude.
Although the daytime length at the Equator remains 12 hours in all seasons, the duration at all other latitudes varies with the seasons. During the winter, daytime lasts shorter than 12 hours; during the summer, it lasts longer than 12 hours. Northern winter and southern summer concur, while northern summer and southern winter concur.
A white night is a night with only civil twilight which lasts from sunset to sunrise. [17] At the winter solstice within the polar circle, twilight can extend through solar noon at latitudes below 72.561° (72°33′43″) for civil twilight, 78.561° (78°33′43″) for nautical twilight, and 84.561° (84°33′43″) for astronomical twilight.