Spring Equinox 2024 Australia Calendar. In fact the word equinox is taken from the latin aequus (equal) and nox (night) or equal night. The first day of spring (march equinox or vernal equinox) is when the sun shines directly on the celestial equator passing from south to north and the length of day and night are almost the same.

In 2024, the fall equinox in the united states will occur on sunday, sept. The date and time at which the centre of the sun is directly over the equator in late september is called the equinox—from the latin for ‘equal night’.