Rhoda Charmine

First Day Of Summer Day 2024. In 2024, the last day of summer in the northern hemisphere is september 22! The first day of what's projected to be an unusually hot summer, the longest day of the year and the summer solstice all arrive thursday, june 20.

Thursday, june 20 is the official first day of northern astronomical summer for 2024 — summer solstice — which is the longest day of the year for this half of the planet. This summer, instead of sending our oldest to summer camp or day care.