On the Arctic Circle, 67.5 degrees north latitude, June 21 is the only day the Sun stays up 24 hours. Technically. Actually, the solstice and refraction through the Earth's atmosphere combine to make the Sun appear - several days in a row - to be up 24 hours.
At this location, the Sun will be at an angle of 47 degrees above the horizon at local noon, and dip to the horizon at midnight.