When Does Summer Start 2024 Canada. Winter starts at the moment when the sun is farthest south: In 2024, summer solstice in the northern hemisphere will occur on thursday, june 20 around 4:50 p.m.

Here are the equinox and solstice dates—plus, answers to common questions about the. Thursday, june 20 is the official first day of northern astronomical summer for 2024 — summer solstice — which is the longest day of the year for this half of the planet.