Longest Day Of Sunlight 2024. On this day, the northern hemisphere is tilted farthest from the sun, giving us the least amount of sunlight. 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.
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. The date of the summer solstice marks the longest day of the year based on the amount of time between sunrise and sunset.