Winter Solstice 2025 Australia 2025. Winter solstice 2025 (beginning of astronomical winter) on the day of the winter (december) solstice, the sun passes through the southernmost point of the ecliptic, that is, as far as possible from the celestial equator to the south (for the northern hemisphere of the earth). We often just think of a solstice as applying to the whole day (or night) but there is a specific period you can look out for.
Here is what it means. This page provides date and local time for winter solstice in the year 2025 for sydney, new south wales, australia.