When Is The Longest Day Summer Solstice 2024. It’ll be the longest day of the year north of the equator, and it is the scientific start of summer. Here's everything you need to know about the northern hemisphere's longest day of the.
A day later, on june 21, the full moon will rise. It marks the longest day and shortest night of the year in the northern hemisphere, and is a result of the earth’s tilt and orbit around.