Summer Solstice 2024 Longest Day Of The Year. The summer solstice is a natural astronomical event that happens when the earth’s axial tilt is at its. When is it and what causes the longest day of the year?
Why is the summer solstice the longest day of the year? According to the website time and date, the 2024 summer solstice will take place on thursday 20 june at 9.50pm, making it the earliest summer solstice in over.