What is Astronomical seasons?

Astronomical seasons are divisions of the year based on the Earth's position in relation to the Sun, primarily defined by the equinoxes and solstices. They are characterized by changes in daylight and temperature, leading to distinct seasonal patterns. The four astronomical seasons are spring, summer, autumn (fall), and winter, which correspond to specific dates: the vernal equinox marks the start of spring, the summer solstice begins summer, the autumnal equinox signals fall, and the winter solstice marks winter. These seasons occur due to the tilt of the Earth's axis and its orbit around the Sun.