What Is The First Day Of Summer 2025 Solstice. It marks the longest day of the year and the arrival of. 20 june will be the longest day of 2025 in the northern hemisphere, midsummer day.

Summer solstice 2025 will take place on june 21st, but in 2025 the summer solstice will take place on june 20th. This is the day when the sun’s annual journey through the constellations of the zodiac carries it to its.