First Day Of Summer 20254 2025 Calendar. How many days until summer 2025? Ensure you are using the current academic year's academic catalog and not an archived catalog.

Known in icelandic as ‘sumardagurinn fyrsti’, the first thursday after april 18th is an icelandic public holiday that. The first day of summer arrives with the solstice this year on friday, june 20, 2025, 10:42 p.m.