First Day Of Summer 20254 2025 Dates. 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. Summer begins with the summer solstice, friday, june 20, 2025, 10:42 p.m.
The summer solstice is the day with the most hours of sunlight during the whole year. Find out the date, how long in days until and count down to till summer 2025 with a countdown clock.
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