First Day Of Summer 20254 2025 Schedule. This year's summer solstice will arrive this thursday on june 20 for the northern hemisphere, according to nasa. This day is also known as the summer solstice.

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.