Summer Solstice 2025 Canada Time. At the june solstice, the sun reaches its northernmost point. On the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial equator, moving from the northern hemisphere to the southern.

The first day of summer (june solstice) is when the sun is in its most northern position directly over the tropic of cancer. Montreal the exact moment of the summer solstice in 2025 is 20 june, at 22:42:02.