Official Start Of Spring 2023 – In the northern hemisphere, spring begins in March; south of the equator, from September. Find summer dates for 2022 and 2023.
Nature can be defined in different ways. Astronomical definitions are based on the equinoxes and solstices, and spring begins with the spring equinox or vernal equinox. In the Northern Hemisphere it is the equivalent in March; south of the equator is the September equinox.
Official Start Of Spring 2023
In meteorology, summer begins on a different date. Also, some countries do not have fixed weather dates, but determine the beginning and end of spring based on average temperatures.
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As spring begins, the length of the day increases considerably in most regions – except in the tropics, where the length of the day does not change much throughout the year.
In fact, growth is greatest in the days surrounding the vernal equinox. After that, the days are still getting longer, but getting shorter. On the longest day of the year, summer, the daily difference is zero.
At the same time, places far from the equator experience daily variations. In Toronto, the day of the vernal equinox is 3 minutes longer than the previous day; in Miami, about 2000 kilometers or 1200 miles south, the difference is only about 1 minute and 31 minutes.
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Our Earth rotates as it orbits the Sun, which is why we have weather on Earth.
Astronomical spring begins at the equinox. The name of the event is derived from Latin and means night, which gives the impression that both day and night are exactly 12 hours long. But that is not true. In most regions, the average day is slightly more than 12 hours.
The day when day and night are equal is called equinox. It falls a few days before the summer solstice and a few days after the fall of the equinox in both parts.
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Especially in the tropics, which is the area between the tropics and the polar regions, spring is also when the cold of winter gives way to warmer weather, although this varies greatly from one region to another.
Spring and summer are celebrated in cultures and religions around the world with various spring traditions, festivals and celebrations.
In the Northern Hemisphere, depending on which definition you use, spring can include parts or all of March, April, May and June. South of the equator it starts in September and ends in December. Read more about the history and meaning of the summer months:
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The Earth does not move at a constant rate in its elliptical (oval) orbit, so the seasons are not constant. On average, summer lasts 92.8 days in the Northern Hemisphere and 89.8 days in the Southern Hemisphere.
Equinox: Equal Day & Night? Equinoxes do not have exactly 12 hours of day and night around the world, as many people believe. Such days, called equilux, happen, but it depends on where you are.
2023 Cosmic Calendar Celestial events and events for 2023 including supermoons, solar and lunar eclipses, meteor showers, solstices and equinoxes. The first day of spring is Monday, March 20, 2023, at 5:24 p.m. EDT. For those of us in the Northern Hemisphere, this marks the arrival of the Vernal Equinox (otherwise known as the “First Point of Aries”).
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Traditionally, we celebrate the first day of spring on March 21, but astronomers and calendar makers now say that spring begins on March 20 in all parts of North America. In 2020, spring falls on March 19, the first day of spring in 124 years!
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No matter what the weather is doing outside, spring is officially the start of summer. Get our official summer weather forecast.
So what does that mean? Basically, our daylight hours – the time each day between sunrise and sunset – have gotten a little longer every day since the winter solstice in December, which is the shortest day of the year (at least at night) ). conditions of light).
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Even though we know that after December 21st the days get longer, we still see more darkness than light throughout the day during these three months before spring. The vernal equinox marks the turning point when the sun begins to overcome the darkness.
At this time, direct sunlight shines on the scale, which creates the effect of equal day and night (give or take a few minutes, see below). After the vernal equinox, direct sunlight migrates north of the equator (with daylight hours gradually increasing) until it reaches the Tropic of Cancer (latitude 23.5 degrees north).
Direct solar migration stops on this day; this is as far north as they go. We call this the summer solstice (
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Is to stop direct solar migration). It is the longest day of the year in terms of daylight hours.
After the summer break, direct rays travel to the south and the days begin to grow. It will take another three months for the fall season to reach daylight and darkness again.
Sunlight reaches the Tropic of Capricorn (latitude 23.5 degrees south) on the winter solstice and the whole cycle begins again!
March Equinox 2023
The question that turns the scales is about the length of day and night. We are taught that on the first days of spring and autumn, day and night are equal to 12 hours all over the world.
However, if you look at the calendar pages in the almanac, you will see that this is not the case. In fact, our tables tell you that on summer and fall days the daylight hours are actually a few minutes darker.
The reason why this happened can be attributed to our environment. If the world were a world without seasons, then in the days of the same length, the length of the day and the night would be equal.
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However, our atmosphere acts like a lens and refracts (bends) its light at the edge of the sky. In other words, when you watch the sun either rise above the sky at sunrise, or go below the sky at sunset, you are looking at an illusion – the sun is not really here, but has already set in the sky.
As a result, we actually saw the sun for a few minutes before its disk actually rises and for a few minutes after it actually sets. So, thanks to the changing climate, the length of daylight increases by about six or seven minutes every day.
Since the seasons are defined as starting at strict 90-degree intervals, these changes in position affect when the Earth reaches every 90-degree angle in its orbit around the Sun.
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Second, the gravitational pull of other planets also affects Earth’s orbit.
As you can see, the warm season, spring and summer, have a combined 7,584 more days than the winter, autumn and winter seasons (good news for warm weather fans!).
The summer is currently reduced by around one minute per year and the winter by half a minute per year. Summer gains time lost by spring, and autumn gains half a minute lost by winter.
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Winter is the shortest period for astronomical observation, and with its periods continuing to decrease, it is expected to reach its lowest value – 88.71 days – in about 3500 years.
It returns to an elliptical orbit, as mentioned above. We are 3.1 million miles from the Sun (called
). And the closer the celestial body is to the sun, the faster it has to move in space – gravity insists on it, this is the basic, natural law that the astronomer Johann Kepler showed 400 years ago. This means that in the colder months, when we are closer to the sun, we move faster through space. In July, when we are further away from the sun, we move very slowly. There are two equinoxes every year: one in March and one in September. In March, the sun crosses the equator from south to north.
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The March equinox is when the sun crosses the equinox – the imaginary line in the sky above the Earth’s equator – from south to north. This happens every year on the 19th, 20th or 21st of March.
Over the course of a year, the heliotrope – the area on the Earth’s surface directly below the Sun – moves slowly along its north-south axis. After reaching its southernmost point in December, it begins to move north until it crosses the equator at the March equinox. The June solstice marks the northernmost point of the journey.
The area under the sun’s rays moves north and south during the year, because the earth’s axis is tilted at an angle of about 23.4° in relation to the ecliptic, the imaginary plane.