Autumn Solstice 2024 Australia. Adelaide the exact moment of the summer solstice in 2024 is 20 march, at 13:36:03. In 2024, autumn equinox in australia (southern hemisphere) will occur on tue, march 20, at sharp 02:07 pm aedt (australian eastern daylight time).

In 2024, australia’s longest day falls on saturday, december 21. On the day of the autumn (september) equinox, the sun, moving along the ecliptic, crosses the celestial.