Summer Solstice Date 2024. Here are the equinox and solstice dates—plus, answers to common questions. What exactly is the summer solstice?
Thursday, june 20 is the official first day of northern astronomical summer for 2024 — summer solstice — which is the longest day of the year for this half of the planet. In 2024, the solstice moment will fall at 20:51 utc (3:51 p.m.