![]() ![]() ![]() Particularly in the temperate zone, which is the region between the tropics and the polar regions, spring is also the time when the cold of winter begins to give way to warmer weather, though this varies substantially from one region to another.Ĭlimate and monthly average temperatures in your city Traditions and Folklore Other astronomical terms & definitions Rising Temperatures It falls a few days before the spring equinox and some days after the fall equinox in both hemispheres. The date when day and night are actually equal is called the equilux. In most regions, daytime at the equinox is a bit longer than 12 hours. The name of the event derives from Latin and means equal night, giving the impression that both day and night are exactly 12 hours long. Our Earth is tilted as it orbits the Sun, which is the reason we have seasons on Earth.Īstronomical spring begins on the day of the equinox. In Toronto, the day of the spring equinox is 3 minutes longer than the previous day in Miami, roughly 2000 kilometers or 1200 miles farther south, the difference is only about 1 minute and 31 seconds. On the longest day of the year, the summer solstice, the day-to-day difference reaches zero.Īt the same time, locations farther from the equator experience larger day-to-day differences. After that, days still get longer, but at an ever-decreasing rate. In fact, the increase is greatest in the days surrounding the spring equinox. Meteorological and other seasons definitions Greatest Increase in Day LengthĪs spring starts, the length of day increases dramatically in most regions-except for the tropics, where day lengths do not change much during the course of a year. Also, some countries don't have fixed season dates but determine the start and end of spring based on average temperatures. In meteorology, the spring season begins on a different date. Sun rise/set and day length around this equinox.This corresponds to Saturday, 23 September 2023, 06:50 UTC. In Odesa, Odessa, Ukraine: Saturday, 23 September 2023, 09:50 EEST (Change location) Spring Equinox, Southern Hemisphere (September)Īustralia, New Zealand, South America, southern Africa Business Date to Date (exclude holidays).This can also result in continuous daylight in far northern countries such as Iceland and Norway. 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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