Summer 2024 Date. 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. Download the monthly calendar for the summer of 2024.
Edt on june 20, according to timeanddate.com. Referendum looms for region 20: