Sunday, September 22 is the autumnal equinox in the Northern Hemisphere, the vernal equinox in the Southern. In the North, this day begins autumn -- best season of the year.
Social summer has already ended in the United States as school went back into session: mid-August to the day after Labor Day, depending on one’s location. In France, social summer ended two weeks ago when teachers reported to their schools. Social summer ended in England on September 14, with the annual BBC Last Night of Proms concert at the Albert Hall.
Whenever social summer ends wherever you are, in the Northern Hemisphere astronomical summer ends on Sunday, with arrival of the autumnal equinox.
That day the Earth will be tilted neither away from nor toward the sun -- a condition that occurs twice each year.
High noon at the equator, our beautiful yellow star will be exactly poised atop the dome of the sky. In the Northern Hemisphere, the sun will appear to move toward the south; in the Southern, appear to move north.
Days will grow shorter in the north, longer in the south. In the Southern Hemisphere, spring arrives; in the Northern, autumn. The cycles of the seasons will be on display in their glory.
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