First Day Of Summer 2024 Time Timer

First Day Of Summer 2024 Time Timer. This is the longest day of the year and marks the start of summer in the northern hemisphere. Here's when summer starts, when it ends, what the longest day of the year is and when winter starts.

Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere. Is it really the longest day of the year?.