First Day Of Summer 2024 Canada 2024. This is the first day of astronomical summer and occurs as the sun reaches its most northerly or southerly path in the sky. Summer begins with the solstice on thursday, june 20, 2024, marking the astronomical first day of summer in the northern hemisphere.
The first day of summer arrives with the solstice this year on thursday, june 20, 2024 at 4:51 p.m. Each season starts on the first day of a specific month and goes on for three months.