Earth’s axis of rotation is tilted about 23 degrees from perpendicular to the plane of its orbit, giving us our seasons. Uranus’ poles are tilted nearly 98 degrees so it is rotating on its side. Imagine the seasons there!
@Latkes for a quarter of the Uranian year only one pole and hemisphere will get sunlight. The other half of the planet will be in darkness. Then a time of transition for a quarter Uranian year and the reverse happens.