Summer Solstice 2025 Date Time. Here's everything you need to know about the northern hemisphere's longest day of the year. For many places, it means summer has officially started.
According to retired nasa scientist fred espenak’s astropixels website, the official northern hemisphere summer ‘pause’ of the sun in 2025 occurs on june 20, at 4:51 p.m. For many places, it means summer has officially started.