![]() In other words, what early humans used to do is to calculate the relative things, like what they felt and observed with the naked eye, which is in fact in the modern notation is known as the meteorological definition of Spring Equinox or simply Meteorological Spring. Additionally, they also understood the pattern of the annual temperature cycle. With time, early humans understood that the sun seems to cross over the horizon after a fixed interval of time. Therefore, what they used to do is to calculate the change in season as humanly as possible. WHY? Because they didn’t have the telescope to do such nasty observations. Let’s Go Back in Timeīefore the arrival of the scientific revolution, humans didn’t know how to calculate the change in the season in terms of astronomical calculations. More importantly, which one of these is the correct one? Let’s find out. Therefore, the question arises that why we have two different definitions for a single event. However, on the other hand, if we go by the astronomical definition of the Spring Equinox, it marks the arrival of the spring season. Well, technically speaking, if we go by the meteorological definition of the spring equinox, it marks the end of half of the vernal or spring season i.e mid-spring. Now is the time that we should talk about the meteorological definition of the spring equinox. Spring Equinox – First Day of Spring or Mid-spring? In fact, this process of longer days and shorter nights will go on until the arrival of the December solstice. Therefore, in the southern hemisphere, the days will become longer and longer with each passing day. In other words, after September Equinox, the sun will start to move southward. Second, You can notice that the days are getting longer and the nights are getting shorter. ![]() First, you will feel that the weather starts to turn warmer, trees begin to grow their leaves, plants start to flower, etc. There are two ways to practically observe the first day of Spring. September Equinox – First Day of Spring in Southern HemisphereĪn Australian beach In January, A month which is considered the coldest one in the northern hemisphere/Credit: Conde Nast Traveler 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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