Summer Solstice 2024 Date And Time. When clocks reach 2 a.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 planet.
Summer solstice 2024 (beginning of astronomical summer) on the day of the summer (june) solstice, the solar disk, moving along the ecliptic, will fall into its northernmost point and will be located at the maximum distance north of the celestial equator. June, july, and august 2024 combined were about 0.2 degrees fahrenheit (about 0.1 degrees celsius) warmer globally than any other summer in nasa’s record — narrowly topping the record just set in 2023.