Summer And Winter Solstice 2024 Calendar. The summer solstice signals the beginning of astronomical summer and the winter solstice signals the beginning of winter. In 2024, it begins tuesday evening in american time zones but on march 20 in coordinated universal time.
It falls on december 21st or 22nd in the northern hemisphere and june 20th or 21st in the southern hemisphere. Summer solstice 2024 (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.