Summer Equinox 2024. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length. Edt (2051 gmt), and the summer solstice for the southern hemisphere occurs on dec.

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. The autumnal equinox occurs in september, and in the northern hemisphere this date marks the end of summer and beginning of autumn.