Last Day Of Summer 2024 Date And Time. Today (june 20) the summer solstice — the longest day of the year in the northern hemisphere — will begin, and it will be the earliest solstice in 228 years. Although some consider summer's end to be labor day or when the kids go back to school , the official last day of summer for 2024 is september 22.
This is the moment during the day when the sun. In 2024 the summer solstice will occur on thursday 20 june at 21.51 bst (20.51 gmt).
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