September's arrival signals the beginning of spring in Australia. But not everywhere follows the same system when it comes to changing seasons.
1 September marks the beginning of Spring in Australia, but not everywhere has the same pattern for season changes.In Australia, the first day of September not only marks a new month but also the beginning of a new season, with spring now officially here.While in some countries — such as Australia and New Zealand — seasons follow a calendar system and change every three months, in others, seasons are based on astronomical timing.
As the Earth orbits the sun, it rotates on its axis, but the axis always points in the same direction. Because of this, the amount of sunlight and heat in different parts of the world changes throughout the year. In places like Australia and New Zealand, which follow the meteorological system, the seasons roll over on the same dates each year. Summer begins on 1 December, autumn on 1 March, winter on 1 June, and spring on 1 September.
Under this system, the longest day of the year is called the summer solstice and marks the beginning of summer, while the shortest is the winter solstice. Autumn and spring are determined by equinoxes, which mark when the centre of the sun is directly over the equator.
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