When Is The Longest Day 2025. The good news is that if you start on the longest night of the year, the days. In the southern hemisphere, it will occur on december 21, 2024.
The midnight sun is a natural phenomenon that occurs in regions near the earth’s poles, notably in the arctic and antarctic. Summer 2025 starts on friday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis having reached its furthest tilt and begins to change.