Autumnal Equinox Begins Tomorrow

Tomorrow, Wednesday, September 23, 2026, the world will celebrate the autumnal equinox, when the sun crosses the celestial equator heading south, marking the beginning of fall in the Northern Hemisphere. The autumnal equinox is an exact astronomical moment after which daylight hours in the north gradually decrease, with longer nights, until the winter solstice in December. This phenomenon is reflected in Tunisia through noticeably later sunrises and earlier sunsets, which is a direct result of Earth's axial tilt of approximately 23.4 degrees, causing the variation in day and night lengths across the seasons.

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