Shortest Day Of Year 2025 Florida. In 2025 the winter solstice will occur on saturday 21 december at 9.21am gmt. Shortest day in miami beach, fl the shortest day of the year will be in 2 months and 1 day, during the winter solstice on december 21, 2025, with a daylight length of 10 hours.

The winter solstice heralds the astronomical start of winter and marks the day with the fewest hours of daylight for the year. But what’s the science behind the shortest day and longest night?