Spring Solstice 2025 Australian Calendar. Year 2025 is a leap year, with 366 days. Public holidays for australia in 2025.

The spring or vernal equinox marks the astronomical first day of spring. After the september equinox, the tilt of earth’s axis increasingly angles our south pole towards the sun, so the sun appears further south in the sky each day until it’s over the tropic of capricorn around.