What Day Is The Shortest Day Of The Year 2024 Usa. It marks the shortest day and longest night of the year and the first day of the winter in astronomical terms. However, as you can see below the 21st is by far the most common.

December 21 will also officially be the ‘shortest day of the year’, as it will have less than ten hours of daylight, something we have already been experiencing for several days as the change. Arizona time, according to the old farmer’s.