Why does the northern hemisphere experience 6 months of winter and 6 months of sunshine rather than regular seasons?

The northern hemisphere does not actually experience 6 months of winter and 6 months of sunshine. Instead, it has four distinct seasons—winter, spring, summer, and fall—caused by the tilt of the Earth's axis as it orbits the sun. This axial tilt results in varying angles of sunlight and day lengths throughout the year, leading to seasonal changes. However, in polar regions, extreme variations in daylight can occur, resulting in prolonged periods of darkness in winter and continuous daylight in summer, which might give the impression of extended seasons.