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longest day of the year

June 21st: the Northern Hemisphere’s Longest Day

June 21st marks the start of the summer solstice in the Northern Hemisphere -- the longest day of the year. You'll have plenty of daylight to think about it, and if you're free, the possibilities are endless. The exact start...

June 21: Longest Day of the Year in the Northern Hemisphere

The longest day of the year in the Northern Hemisphere, or the summer solstice, is Monday and is celebrated as the coming of summer.