Astronomical Autumn 2026
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The day is announced with the appearance of the Autumnal Equinox.
It is the season determined by the Earth's position and tilt relative to the sun.
It is a separate occurrence from the meteorological season which is based on the annual temperature cycle and the civil calendar.
I'm okay with it all. I think it is fine to have two different sets of criteria for the same event.
I believe that it provides for accuracy.