How Many Days Until Summer 2024 Solstice 2024. Thursday, june 20 is the official first day of northern astronomical summer for. Find out the date, how long in days until and count down to since june solstice in 2024 with a.

Here’s everything you need to know about the northern hemisphere’s longest day of the year. The first day of summer is also known as the summer solstice, and in 2024 it happens on thursday, june 20 at 4:51 p.m.