Summer 2026 Date. Summer 2026 starts on sunday, june 21st 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. It also lists astronomical sunrise and sunset timings on summer solstice day.
How many days until summer 2026? Each season brings different weather, hours of light, and.