These are the march equinox and September equinox. Moreover, you also know that there are two types of Equinox. Image Credit: Glyph WebĪs you already know that an equinox occurs when the center of the sun appears to cross over the celestial equatorial line of the earth. And, the Spring Equinox, also known as the Vernal equinox marks the first day of spring.Īn image of the first day of the spring of the Indian Union territory of Jammu and Kashmir. Fall equinox, also known as the autumnal equinox marks the first day of fall. Not to mention, there are two types of equinoxes. In layman, one can say that an equinox occurs when the sun switches sides from one hemisphere of the earth to the other. So, moving ahead, according to astronomy, this is a naturally occurring event during which the center of the sun appears to cross over the celestial equatorial line of the earth. We will talk about it in a later section. That doesn’t mean I won’t be explaining the meteorological definition of equinoxes. Right now, I am going to explain it on the basis of astronomy. These are astronomical and meteorological definitions of Equinox. There are two ways to define the meaning of equinox. Or, the March Equinox i.e the first day of spring in the northern 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 exclusive article, we will talk about the fact that why there is a mismatch between the north and south equinoxes. CONFUSED? Don’t worry, we will talk about it in a later section. Not to mention, regardless of the fact that at which side of the hemisphere you live upon, the length of day and night are almost exactly equal on the eve of Equinox. ![]() In other words, the meaning of equinox changes depending on the fact that at what side of the hemisphere you live upon. That’s why in the earth’s southern areas, the March equinox is known as the Fall Equinox. On the other hand, for the people living in the southern hemisphere, this equinox marks the arrival of the first day of fall (autumn) in the southern hemisphere. Hence, March Equinox is known as Spring Equinox in the northern hemisphere. This can also result in continuous daylight in far northern countries such as Iceland and Norway.The first day of spring 2023 (Northern Hemisphere) will occur on Monday, March 20 at 21:25 Universal Coordinated Time (UTC). During the summer solstice, the Northern Hemisphere of Earth is tilted towards the Sun, resulting in increased sunlight and warmer temperatures. This situation is reversed at the winter solstice.Īt the summer solstice, the Sun reaches its highest point of the year, while at the winter solstice, the noon Sun is the lowest it will be all year. When it is the summer solstice in the Northern Hemisphere, the areas north of the Arctic circle receive sunlight for a full 24 hours, while areas south of the Antarctic circle have a full day of total darkness. The summer solstice, which occurs around the 21 June in the Northern Hemisphere, is the day of the year with the longest period of daylight while the winter solstice, on or around the 21 December in the Northern Hemisphere, is the day with the shortest period of daylight. These occur twice a year and are referred to as the 'summer solstice' and 'winter solstice'. The equilux is when day and night are equal and occurs a few days before the spring equinox, and a few days after the autumn equinox. The Sun, therefore, appears to rise before its centre at the horizon, giving more daylight than you might expect (12 hours 10 minutes on the equinox). As well as this sunlight is refracted by the Earth's atmosphere. This is because the Sun appears as a disk in the sky, and the top half rises above the horizon before the centre. On the equinox, the length of day and night are only nearly equal. Similarly, the autumn equinox marks the start of autumn as the night becomes longer than the day. ![]() ![]() The spring equinox marks the beginning of spring and from this day forward the day is longer than the night. During the equinox, day and night will be around the same length which is evident in the word's origin derived from the Latin equi (meaning 'equal') and nox (meaning 'night'). They occur between the summer and winter solstices marking the point the Sun crosses the equator's path and becomes positioned exactly above the equator between the Northern and Southern Hemisphere. The Equinox in the Northern Hemisphere occurs twice a year around 20 March (the spring equinox) and around 22 September (the autumn equinox). The equinox and solstice define the transitions between the seasons of the astronomical calendar and are a key part of the Earth's orbit around the Sun.
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