Longest Day Of The Year 2024 Canada. Every year june 21st, 2024 occurs a natural phenomenon that is celebrated as the longest day of the year. The longest day of the year (for this hemisphere, at least) is coming up this saturday, june 20, marking the summer solstice for much of the world’s population.

That means there are more hours of daylight than any. This year, in the northern hemisphere, june 20 will be the longest day of the year.