alt Hacker News1. Go out every morning to work in your field. 2. When the Sun rises, make a note on the same fixed piece of wood, e.g., a fence. 3. Observe the leftmost and rightmost positions, these are your solstices. 4 You can now use your fence to identify and predict solstices.
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JKCalhoun • today at 1:42 PM
I have read that the auspicious date of December 25th may have been intended to be the Solstice but that the degree of error for "making a note on a fence" is why we have the 25th.
Merry Sun-Fence Day everyone. ;-)
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It can be tricky b/c Sun's azimuth at sunrise varies by a hundredth of a degree on days directly before and after the solstice.
Also fun fact: date of latest sunrise is slightly out of phase with seasons https://xkcd.com/2792/