When Does Summer Start 2024 Usa. The first day of summer officially begins in the northern hemisphere on thursday, june 20, 2024, at 4:51 p.m. Edt on june 20, according to timeanddate.com.
It’s the earliest start to the season since 1796, thanks to quirks in the. 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.