When Does Summer Officially Start Uk 2025. When the north pole is tilted towards the sun it is summer in the northern hemisphere. Here are the equinox and solstice dates—plus, answers to common questions about the seasons of the year in north america.
This is referred to as astronomical summer or the summer solstice. Well, according to the astronomical calendar, summer in the northern hemisphere officially begins on thursday, june 20 and ends on sunday, september.