CLEVELAND — Autumn has officially arrived across Northeast Ohio , the seasonal shift is marked by the autumn equinox . But there’s another, lesser-known milestone that matters just as much for daylight watchers: the local “equinox,” or more precisely, the equilux.

The astronomical autumn equinox occurs when the sun crosses the celestial equator, signaling the start of fall in the Northern Hemisphere. This year, it fell on September 22nd at 2:19 p.m. EDT. On that day, Earth’s tilt and orbit place the sun directly above the equator, creating nearly equal amounts of daylight and darkness worldwide.

But in Cleveland, day and night aren’t perfectly balanced on the equinox itself. That’s where the equilux comes in. Derived from the Latin words for “equal” and “light,” the equilux is the da

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