World Longest Day 2025 Calendar. Ten business trends for 2025, and forecasts for 15 industries. This is the day when the sun's annual journey through the constellations of the zodiac carries it to its most northerly point in the sky, in the constellation of cancer at a declination of 23.5°n.
Even though most people consider june 21st as the date of the june solstice, it can happen anytime between june 20th and june 22nd, depending on which time zone you’re in. This is the day when the sun’s annual journey through the constellations of the zodiac carries it to its most northerly point in the sky, in the constellation of cancer at a declination of 23.5°n.