What Day Is The Summer Solstice 2025 Calendar. 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. The summer solstice announces the first day of summer, and its arrival happens twice a year—once in the northern hemisphere and once in the southern hemisphere.

Friday, jun 20 7:32 pm pdt. The times of the solstices mark the beginning of summer and winter.