Summer Solstice 2025 Australia Calendar. In the southern hemisphere, the summer solstice takes place between december 20, 21, 22, or 23 each year. The word solstice comes from latin ' solstitium ' meaning the sun stands still.

Summer solstice 2025 (beginning of astronomical summer) on the day of the summer (june) solstice, the solar disk, moving along the ecliptic, will fall into its northernmost point and will be located at the maximum distance north of the celestial equator. This is the first day of astronomical summer and occurs as the sun reaches its most.