Summer Solstice 2025 Time Edt. In the northern hemisphere, the summer solstice will occur on june 21, 2025 at 02:42 gmt (june 20, 9:42 p.m. Hence, in the northern hemisphere, the march equinox is the beginning of spring;

Summer solstice 2025 (beginning of astronomical summer) on the day of the summer (june) solstice, the solar disk, moving along the ecliptic, will fall into its northernmost point and will be. And the december solstice, winter.