Shortest Day Of The Year 2024 Meaning. For the more than 6 billion people living in the northern hemisphere, this astronomical event signals not only the shortest day but also the longest night of the year. 21, and is marked with traditions and celebrations around the world.

For those in the northern hemisphere, saturday, december 21, will mark the shortest day and longest night of the year. December 21, 2024, marks the beginning of astronomical winter in the northern hemisphere.