In tropical and subtropical regions, several geographical sectors do not present defined seasons but in the seasonal tropics, the annual wet and dry seasons are recognized and tracked.Ī calendar year is an approximation of the number of days of the Earth's orbital period, as counted in a given calendar. In temperate and subpolar regions around the planet, four seasons are generally recognized: spring, summer, autumn and winter.
Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hours of daylight, and, consequently, vegetation and soil fertility. The duration of the year is the time taken to go around the Sun.Ī year is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. An animation of the inner Solar System planets' orbit around the Sun.
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