In fact, it happens because of the sun’s passing over the Equatorial line. Don’t think that the earth’s axial tilt will become Zero during the equinoxes. In other words, we will have equal day and night i.e 12 hours. Hence, daylight and nighttime hours are equal. Or, you can say that on the eve of an equinox, the earth’s axis is neither tilted toward nor away from the sun. WHY? Because when the sun crosses over the imaginary celestial line, the earth’s tilt becomes perpendicular to the sunshine. We have equal days and nights during September Equinox (also during March Equinox). Illumination of Earth by the Sun on the day of the equinox (fall or spring). September Equinox – First Day of Spring in Southern Hemisphere
On the other hand, due to the earth’s tilt, the equinox that occurs in September in the northern hemisphere is the Fall or Autumn Equinox. Marks the first day of fall, therefore, Fall Equinox.įrom the above comparison chart, it is clear that the equinox that occurs in September in the southern hemisphere is the Spring Equinox. Marks the first day of spring, therefore, Spring Equinox. It marks the first day of summer, therefore, Summer Solstice. It marks the first day of winter, therefore, Winter Solstice. In the northern hemisphere, it marks the first day of spring, therefore, Spring or Vernal Equinox. In the southern hemisphere, it marks the first day of fall, therefore, Fall or Autumn Equinox. Or, the first day of spring in the southern hemisphere is actually the official first day of spring or not? Therefore, I would suggest you stick with me till the end. Moving ahead, in this article, we will talk about some of the exclusive facts like why there is a mismatch between the north and south equinoxes. CONFUSED? Don’t worry, we will talk about it in a later section. Regardless of the fact whether you are living in Newyork (northern hemisphere) or Sydney (southern hemisphere), the length of the day and night are almost exactly equal on the eve of the Equinox. In other words, the meaning of the Equinox changes depending on the fact that at which side of the earth you live.
On the other hand, for the people living in the northern hemisphere, this Equinox marks the arrival of the official first day of fall in the northern hemisphere. In 2023, the official first day of spring in Australia (southern hemisphere) will occur on Saturday, September 23, at sharp 16:50 Australian Eastern Standard Time (AEST). That’s why in the earth’s southern areas, the September Equinox is known as the Spring Equinox. September Equinox marks the arrival of the first day of spring in the southern hemisphere.
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