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The 2024 winter solstice is at 4:21 a.m. EST on Saturday, Dec. 21.
Credit score: Pixabay/ AlainAudet
Winter doesn’t formally arrive till the solstice. The 2024 winter solstice — the exact second when the Solar seems farthest south within the sky — is at 4:21 a.m. on Saturday, Dec. 21, within the Northern Hemisphere, in response to the U.S. Naval Observatory.
All through the Northern Hemisphere, the day of the solstice has the fewest hours of potential daylight and the night time has essentially the most nighttimes. (Within the Southern Hemisphere, the place this solstice marks the start of summer season, days are actually longest and nights shortest.) But the earliest sundown and newest dawn of the yr don’t coincide with the shortest day. This occurs as a result of Earth’s orbit across the Solar will not be an ideal circle and the lean of our planet’s axis isn’t aligned with the solstice.
The Naval observatory’s website online has this useful gizmo that may present you the seasons of the Earth from 1700 to 2100.
The precise dates of the earliest sundown and newest dawn rely on latitude, however the sequence at all times stays the identical: earliest sundown, shortest day, and newest dawn. At 40° north latitude, the earliest sundown comes round Dec. 7 and the most recent dawn round Jan. 4. The dates are nearer collectively at greater latitudes and farther aside at decrease latitudes.
The Solar’s southerly place causes two different noticeable results. First, noontime shadows seem longer on the solstice than at every other time of yr. You’ll be able to show this to your self by utilizing a constructing or different secure construction — even a well-anchored stick within the floor will work — and marking the size of its shadow on the bottom at native midday (when the Solar lies due south). The shadow can be longest on the day of the solstice.
Associated: The Nationwide Climate Service on the seasons and winter solstice
Earth’s tilt because it orbits across the Solar places that one a part of the planet extra instantly uncovered to the Solar’s rays. Credit score: Shutterstock.
Second, the Solar rises and units farthest south on the solstice. Merely discover a spot with a transparent view of the horizon towards both the southeast or southwest. Then repair the place of the Solar relative to a handy landmark because it rises or units for a number of weeks across the solstice. You’ll discover the Solar seems farthest south on the solstice.
It might come as a shock that in lots of cultures, this darkish and dreary time of yr marked an event to have fun the Solar. Individuals in Mesopotamia, Persia, Babylon, and even historic Greece and Rome all held celebrations in late December and early January, rejoicing on the Solar’s impending conquer darkness. The life-giving Solar had “bottomed out” and was starting its lengthy march again to the north, foreshadowing hotter climate sooner or later.
This story was initially revealed December 22, 2023.
