What occurs over the polar regions at certain times of the year?

Over the polar regions, extreme variations in daylight occur at certain times of the year. During the summer months, the poles experience continuous daylight, known as the Midnight Sun, where the sun remains visible for 24 hours. Conversely, in winter, the poles undergo Polar Night, during which the sun does not rise for an extended period, resulting in prolonged darkness. These phenomena significantly impact the local climate, ecosystem, and wildlife behaviors.