Shortest Daylight Of The Year 2025. At the september equinox, the sun is moving from north to south as it crosses above the equator. The shortest day and the longest night of the year in the northern hemisphere occur during winter solstice which is usually observed on december 21st or sometimes on december 22nd (see table 1).
However, as you can see below the 21st is by far the most common. The maximum length of daylight hours and the shortest night of the year.
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