Summer Solstice 2024 Date And Time And Date. This is the first day of astronomical summer and occurs as. Why is this day so.
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. In the northern hemisphere, the 2024 summer solstice will occur on june 20 at 20:51 gmt (4:51 p.m.