What Is The Longest Day Of The Year 2025. Even though most people consider june 21st as the date of the june solstice, it can happen anytime. The longest day of the year falls on either june 20 or 21 every year in the northern hemisphere.
20 june will be the longest day of 2025 in the northern hemisphere, midsummer day. The next solstice will occur on june 20, 2024, at 20:51 gmt (4:51 p.m.