The North Pole experiences 24 hours of daylight on the summer solstice.
This happens because Earth’s axis is tilted about 23.44 degrees relative to its orbital plane. Around the June solstice, the Northern Hemisphere is tilted most directly toward the Sun, keeping the North Pole on the daylight side of Earth throughout the daily rotation.
The Sun does not rise high overhead at the pole. Instead, it appears to circle the sky at a nearly constant altitude, reaching its greatest elevation at the solstice. The Sun remains above the horizon from shortly before the March equinox until shortly after the September equinox, a period of roughly six months.
A common mix-up is confusing daylight with ordinary daytime. At the North Pole, daylight lasts continuously through the solstice, while the South Pole is experiencing its long polar night. Atmospheric refraction also makes the exact dates of sunrise and sunset slightly different from the ideal geometric model.