When Are | The Seasons

The Earth's rotation on its axis and its orbit around the Sun are the fundamental drivers of the seasons. The planet's axis of rotation is tilted at an angle of approximately 23.5 degrees relative to the plane of its orbit around the Sun. This axial tilt, also known as the obliquity of the ecliptic, is responsible for the changing seasons.

So, when are the seasons? The most physically accurate answer is: That moment—the solstice or equinox—can occur at any hour of any day in March, June, September, or December. The date varies by a day or two because the tropical year (365.2422 days) doesn't align perfectly with our calendar's 365 days, necessitating leap years to recalibrate. when are the seasons

Crucially, because of a phenomenon called (Earth's slightly elliptical path), the planet is actually closest to the Sun (perihelion) around January 4th, during the Northern Hemisphere's winter. This proves distance is not the driver—it is the angle and duration of sunlight. The Earth's rotation on its axis and its

While the astronomical factors mentioned above provide the underlying framework for the seasons, climatic factors play a significant role in shaping the characteristics of each season. Some of these factors include: So, when are the seasons