First Day Of Summer 2025 Canada Time. The first day of summer in canada and the rest of the northern hemisphere is june 21st or 22nd when the sun is farthest north. The following table shows the dates together with the exact time in which each of the seasons of the year begin.

Find out the date when summer is in 2025 and count down the days until summer with a countdown timer. Here’s a chart that shows what day.