First Day Of Summer 2024 Time. This year, the first day of summer, also known as the summer solstice, is thursday, june 20. In 2024, the summer solstice will occur at 4:50 p.m.
In 2024, the last day of summer in the northern hemisphere is september 22! Thursday, june 20 is the official first day of northern astronomical summer for 2024 โ summer solstice โ which is the longest day of the year for this half of the.