When Does Summer Start 2024 Us. From an astronomical point of view, summer in the northern hemisphere officially begins on thursday, june 20 and ends. When do the four seasons start in 2024—for spring, summer, fall, and winter?

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. Here’s when the holiday falls in 2024 and why its celebrated.