There is an old saying about making hay while the sun shines - a recognition that farm chores last as long as there is daylight. The last four weeks have been witness to my neighbors fetching their first cutting of hay; along with spreading manure, tilling, discing and planting. It has been a busy place here in flyover country.
We know that the summer solstice tomorrow marks the longest day of the year yet the latest sunset of 2025 doesn't occur on that date. Let me explain.
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Solstice Stone - Stonehenge, UK |
The
solstice marks the farthest point of advance in the sun's relentless
march to the north, delivering the maximum daylight hours of the year for the Northern Hemisphere and the minimum daylight hours of the year for the Southern Hemisphere. The solstice this month marks the beginning of summer here in the Northern Hemisphere and the winter in the Southern Hemisphere. The word
solstice literally translates to: sun standing still. Following
this event the sun begins to march in the opposite direction and heads
south with our daylight hours getting shorter. Daylight will continue
to dwindle until December 21 - The dark days of the winter solstice -
and the first astronomical day of winter after which the process
reverses and repeats itself.
All
of this aside, there is a curious paradox in play as a few evenings
immediately following the solstice seemingly and inexplicably get
brighter.
If
you were to check your Farmers' Almanac sunset tables on pages 150 and
151 you would note that at latitude 40 degrees north the sunset occurs at 8:33 every day from June 21st thru July 3rd. On June 27th it will set a few seconds later compared to the 26th or 28th.
What gives?
We all know that following the solstice the days grow shorter so logically the sun should be setting earlier, no?
Here
in the northern hemisphere, where you live halfway between the equator
and the north pole, on the 27th of June the sun will set
just a few seconds later. While this would seem to defy both logic and
the science about days getting shorter; as a consequence of our
elliptical orbit around the sun and the phenomenon astronomers call analemma the earth is several million miles farther from the sun and moving at the slowest speed around it. Which would explain the hiccup in the sun setting.
Most
of you may not be making hay today; nevertheless, on Friday of next week enjoy a couple of
extra seconds of sunlight as you take-in another sunset.
Cheers!