Summer Solstice 2025 Day. By the time we reach the summer solstice on june 20, 2025, it will be the longest day of the year. This means the nights will slowly become longer across the country until the winter solstice, which is usually.
On the summer solstice, when the northern tilt is closest to the sun, we have the longest day, usually june 20 or 21. The following table shows the dates together with the exact time in which each of the seasons of the year begin.