Date Of Summer Solstice 2025. The summer solstice marks the beginning of summer by the astronomical calculation, with the season lasting until the autumnal equinox, which this year lands on. Here's why this day is the longest day of the year, with the most hours of daylight.


Date Of Summer Solstice 2025

March 20, 2025 at 2:01 am pdt : Friday, jun 20 10:32 pm edt.

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