Summer Solstice 2024 Events In Australia. Other 2024 space mission events. The summer solstice on december 21, 2024, marks the longest day of the year for australia,.

The exact timing of the solstice varies by time zone, but includes 5.20pm in perth, 6.50pm in darwin, 7.20pm in brisbane,. Other 2024 space mission events.