First Day Of Summer 2024 Calendar Date And Time. Last updated 17 may 2024. In 2024, the solstice moment will fall at 20:51 utc (3:51 p.m.
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. When do the four seasons start in 2024—for spring, summer, fall, and winter?