Summer Time Begins 2025 Dates. Consult the above table for exact dates. Summer 2025 starts on friday, 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.
In 2025, these are the astronomical dates and times for the start of each season: Dynamic amphitheater run kicks off june 6 in indianapolis with support from dylan marlowe and drew baldridge ticket on sale begins friday, january 10 at 10 a.m.