September Equinox 2024 Australia. The reason for the seasons. In the northern hemisphere, the closest.

September equinox | 22nd september the september equinox marks the official start of spring, and in south west wa we recognise six seasons in line with the nyoongar. The date and time at which the centre of the sun is directly over the equator in late september is called the equinox—from the latin for ‘equal.