Summer Solstice 2024. Today (june 20) the summer solstice — the longest day of the year in the northern hemisphere — will begin, and it will be the earliest solstice in 228 years. Summer solstice, occurring around june 20 or 21, marks the longest day of the year in the northern hemisphere.
Edt (2051 gmt), and the summer solstice for the southern hemisphere occurs on dec. The winter solstice on december 21, 2024, marks the shortest day and longest night in the northern hemisphere.
