What Is Summer Solstice 2024 Meaning. The summer solstice marks the longest day of the year, which means that there is the longest period of time. Edt (2051 gmt), and the summer solstice for the southern hemisphere occurs on dec.
This day is also the longest of the year, featuring the greatest number of daylight hours in. Edt (2051 gmt), and the summer solstice for the southern hemisphere occurs on dec.