September Equinox 2024 Australia. Spring equinox 20 march, summer solstice 21 june, autumn equinox 22 september, winter solstice 21 december. In different time zones, the date of the solstice can differ by a day, so it is important to indicate your exact location.

In different time zones, the date of the solstice can differ by a day, so it is important to indicate your exact location. But not everywhere follows the same system when it comes to changing seasons.