Thanks to daylight savings time, more of your waking hours will be in daylight on Wednesday, June 21.
June 21 is the summer solstice, when northern climes see the midnight sun. In Alaska, you'll see more than 19 hours of daylight, while in the continental U.S., the sun will shine from 14 to 16 hours.
In some parts of Norway, there is no sunset at all from about April 19 to August 23. Parts of Canada, Greenland, Sweden, Finland and Russia are similar.
The word solstice comes from the Latin for "sun stands still." For several days before and after each solstice, the sun appears to stand still in the sky. Its noontime elevation does not seem to change.
At the north and south poles, the sun only rises once and sets once each year. During the six months when the sun is visible, it constantly moves around the horizon and reaches its highest point in the sky at the summer solstice. During the six month polar night, the sun is never visible.