Summer Solstice 2024 Longest Day

Summer Solstice 2024 Longest Day. Here's everything you need to know about the science, and timing, of the summer solstice. The summer solstice, occurring on june 20, 2024, marks the start of astronomical summer in the northern hemisphere.

The summer solstice marks the longest day and shortest night of the year. It’ll be the longest day of the year north of the equator, and it is the scientific start of summer.