First Day Of Summer Day 2024. I n 2024, june 20 marks the summer solstice, the first official day of astronomical summer. That’s just after father’s day and juneteenth —so we recommend.
A day later, on june 21, the full moon will rise. — summer 2024 starts on thursday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis having reached its furthest tilt and begins to change directiion back.