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Autumn Begins with Equal Day and Night
The fall season officially began in the Northern Hemisphere on September 23, 2026, and lasts approximately 89 days and 20 hours. The autumnal equinox is one of the important events during this season, marking the time when day and night are equal in length, and the Sun is aligned with the Equator, making it easier to determine cardinal directions. It is observed that after the equinox, the Sun gradually shifts southward, leading to decreasing daylight hours and increasing nighttime hours, along with changes in lighting angles and various astronomical effects, including the Sun passing over the Equator and its apparent movement from north to south. Winter begins on December 21 and lasts about 88 days and 23 hours, during which the Sun reaches its lowest elevation in the sky. The night lengthens and the day shortens gradually during this period.
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