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1st day of spring 2019 usa


1st day of spring 2019 usa

The Spring Equinox will officially start today, Wednesday, March 20, at 9.58pm GMT (2.58pm PT). The Spring Equinox delivers on nature's promise. The academic calendar is the official University document listing the major academic dates for the university year. Cal State LA's academic calendar is. First Day of Spring 2016 (Northern Hemisphere) · First Day of Spring 2014 · First Day of Fall 2017 (Southern Hemisphere) · Spring 2019.
1st day of spring 2019 usa

1st day of spring 2019 usa -

Here’s a list of the exact dates and times for the first days of winter, spring, summer, and fall for the next several years.

All times shown are Eastern Times, with adjustments made for Daylight and Standard Time changes.

2021 Seasons

  • Spring begins with the Vernal Equinox, Saturday, March 20, 2021, 5:37 a.m.
  • Summer begins with the Summer Solstice, Sunday, June 20, 2021, 11:32 p.m.
  • Fall begins with the Autumnal Equinox, Wednesday, September 22, 2021, 3:21 p.m.
  • Winter begins with the Winter Solstice, Tuesday, December 21, 2021, 10:59 a.m.

2022 Seasons

  • Spring begins with the Vernal Equinox, Sunday, March 20, 2022, 11:33 a.m.
  • Summer begins with the Summer Solstice, Tuesday, June 21, 2022, 5:14 a.m.
  • Fall begins with the Autumnal Equinox, Thursday, September 22, 2022, 9:04 p.m.
  • Winter begins with the Winter Solstice, Wednesday, December 21, 2022, 4:48 p.m.

2023 Seasons

  • Spring begins with the Vernal Equinox, Monday, March 20, 2023, 5:24 p.m.
  • Summer begins with the Summer Solstice, Wednesday, June 21, 2023, 10:58 a.m.
  • Fall begins with the Autumnal Equinox, Saturday, September 23, 2023, 2:50 a.m.
  • Winter begins with the Winter Solstice, Thursday, December 21, 2023, 10:278 p.m.

2024 Seasons

  • Spring begins with the Vernal Equinox, Tuesday, March 19, 2024, 11:06 p.m.
  • Summer begins with the Summer Solstice, Thursday, June 20, 2024, 4:51 p.m.
  • Fall begins with the Autumnal Equinox, Sunday, September 22, 2024, 8:44 a.m.
  • Winter begins with the Winter Solstice, Saturday, December 21, 2024, 4:21 a.m.

2025 Seasons

  • Spring begins with the Vernal Equinox, Thursday, March 20, 2025, 5:01 a.m.
  • Summer begins with the Summer Solstice, Friday, June 20, 2025, 10:42 p.m.
  • Fall begins with the Autumnal Equinox, Monday, September 22, 2025, 2:19 p.m.
  • Winter begins with the Winter Solstice, Sunday, December 21, 2025, 10:03 a.m.

2026 Seasons

  • Spring begins with the Vernal Equinox, Friday, March 20, 2026, 10:46 a.m.
  • Summer begins with the Summer Solstice, Sunday, June 21, 2026, 4:24 a.m.
  • Fall begins with the Autumnal Equinox, Tuesday, September 22, 2026, 8:05 p.m.
  • Winter begins with the Winter Solstice, Monday, December 21, 2026, 3:50 p.m.

Keep Exploring

Источник: https://www.farmersalmanac.com/the-seasons
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Источник: https://www.npr.org/2020/03/19/817237429/spring-starts-today-all-over-america-which-is-weird

September Equinox marks the arrival of the first day of spring in the southern hemisphere. That’s why in the earth’s southern areas, the September Equinox is known as the Spring Equinox. In 2021, the official first day of spring in Australia (southern hemisphere) will occur on Thursday, September 23, at sharp 5:21 Australian Eastern Standard Time (AEST).

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 other words, the meaning of the Equinox changes depending on the fact that at which side of the earth you live upon.

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. CONFUSED?? Don’t worry, we will talk about it in the later section.

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? 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. Let’s dive right in!!!

What is Equinox?

There are two ways to define the meaning of equinox. These are astronomical and meteorological definitions of Equinox. Right now, I am going to explain it on the basis of astronomy. That doesn’t mean I won’t be explaining the meteorological definition of equinoxes. We will talk about it in the later section.

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. In layman, one can say that an equinox occurs when the sun switches sides from one hemisphere of the earth to the other.

Not to mention, there are two types of equinoxes. Fall equinox, also known as the autumnal equinox that marks the first day of fall. And, the Spring Equinox, also known as Vernal equinox that marks the first day of spring.

Four Seasons

types-of-seasons-on-earth

In case if you don’t know, there are generally four seasons that occur on earth. These are summer, winter, autumn, and spring. Just like the fall and spring equinox is responsible for the arrival of fall and spring seasons on earth.

In a similar way, the winter and summer solstice is responsible for the arrival of winter and summer season on earth. To summarise, each year earth experiences 2 solstices (summer and winter) and 2 equinoxes (spring and fall) that help us to understand the patterns related to the changing seasons.

Now, the question arises that why there is a mismatch between the south and north. To put it differently, why when there is a spring equinox in the southern hemisphere, there is a fall equinox in the northern hemisphere? Let’s find out!!!

Thanks to Earth’s Tilt, We See Equinoxes

earth's-tilt-reason-for-seasons

Well, there is a small correction here. Not only we see equinoxes because of the earth’s tilt. We see solstices too. Moving ahead, just because the earth has an axial tilt of 23.4 degrees, there is a mismatch between the southern and northern hemispheres.

In fact, Kepler’s law also contributes to the formation of the different seasons across the globe. YES, YES, the same Kepler’s law that states that all the planets in the solar system revolve around the sun in an elliptical orbit.

However, Kepler’s law contribution can’t be compared to the role played by the earth’s tilt. I mean, if I say in terms of approximated ratios. Then it will be like 90:10.

September Equinox – First Day of Spring in Southern Hemisphere

first-day-of-spring-in-australia

As you already know that an equinox occurs when the center of the sun appears to cross over the celestial equatorial line of the earth. Moreover, you also know that there are two types of Equinox. These are march equinox and September equinox.

So, how to define March Equinox or September equinox. OKAY, let me rephrase my question for you!!! What’s the difference between the march and September equinox? Any Guess???

Well, the primary difference between the March and September equinox is that during March equinox, the sun switches sides from the southern hemisphere to the northern hemisphere of the earth. That’s why the March Equinox is also known as the Northward Equinox.

On the other hand, during the September Equinox, the sun switches sides from the northern hemisphere to the southern hemisphere of the earth. That’s why the September equinox is also known as the Southward Equinox.

September Equinox – Southward Equinox

earth's-illumination-during-different-season-in-different-hemisphere

Moving ahead, as the sun crosses over the imaginary celestial line from the north to the south direction. The earth’s southern areas start to warm up rapidly. Refer to the above image for proper understanding.

Hence, marking the end of the winters and the arrival of the first day of spring in the southern hemisphere. That’s why the September Equinox aka Southward Equinox is officially known as the Vernal or Spring Equinox 2021 in the southern hemisphere.

Equal Day and Night

equal-day-and-night-during-first-day-of-fall-or-spring

Yup, you heard me right. We have equal day and night during September Equinox (also during March Equinox). WHY? Because when the sun crosses over the imaginary celestial line, the earth’s tilt becomes perpendicular to the sunshine. Or, you can say that on the eve of an equinox, the earth’s axis is neither tilted toward nor away from the sun.

Hence, daylight and nighttime hours are equal. In other words, we will have equal day and night i.e 12 hours. Don’t think that the earth’s axial tilt will become Zero during the equinoxes. In fact, it happens because of the sun’s passing over the Equatorial line.

Moving ahead, in the light of equal day and night phenomena, I just want to clarify that it’s not exactly equal. It’s nearly equal to 12 hours. Therefore, just for approximation, we simply say that during the vernal equinox and autumnal equinox, the length of day and night becomes equal.

Longer Days and Shorter Nights in Southern Hemisphere

australia-after-first-day-of-spring

There are two ways to practically observe the first day of Spring. First, you will feel that the weather starts to turn warmer, trees begin to grow their leaves, plants start to flower, etc. Second, You can notice that the days are getting longer and the nights are getting shorter.

In other words, after September Equinox, the sun will start to move southward. Therefore, in the southern hemisphere, the days will become longer and longer with each passing day. In fact, this process of longer days shorter nights will go on until the arrival of the December solstice.

Spring Equinox – First Day of Spring or Mid-spring?

Now is the time that we should talk about the meteorological definition of the spring equinox. Well, technically speaking, if we go by the meteorological definition of the spring equinox, it marks the end of the half of the vernal or spring season i.e mid-spring.

However, on the other hand, if we go by the astronomical definition of the Spring Equinox, it marks the arrival of the spring season. Therefore, the question arises that why we have two different definitions for a single event. More importantly, which one of these is the correct one? Let’s find out.

Let’s Go Back in Time

Before the arrival of the scientific revolution, humans didn’t know how to calculate the change in the season in terms of astronomical calculations. WHY? Because they didn’t have the telescope to do such nasty observations.

Therefore, what they used to do is to calculate the change in season as humanly as possible. With time, early humans understood that the sun seems to cross over the horizon after a fixed interval of time. Additionally, they also understood the pattern of the annual temperature cycle.

In other words, what early humans used to do is to calculate the relative things, like what they felt and observed with the naked eyes, which is in fact in the modern notation is known as the meteorological definition of Spring Equinox or simply Meteorological Spring.

On the other hand, what our astronomers and scientists calculate with their super-sophisticated technology is defined as the astronomical definition of Spring Equinox or simply Astronomical Spring.

Therefore, to conclude, I would say that both definitions are correct in their own sense. Hence, as a result, some people define the Spring Equinox in the southern hemisphere as the first day of the spring season.

On the contrary, some people define it as the end of the half of the vernal or spring season, hence mid-spring. Not to mention, the meteorological seasons always arrive approx 20 days before the arrival of astronomical seasons. To understand it more clearly, refer to the below table.

When is the First Day of Spring 2021 in the Southern Hemisphere?

This year’s September Equinox i.e the Spring equinox in Australia (southern hemisphere) will happen on Thursday, September 23, at sharp 5:21 Australian Eastern Standard Time (AEST). Not to mention, this astronomical event will occur at the same moment for all of us.

I mean, whether you are living in New Zealand or in Australia, or in Newyork (i.e in the northern hemisphere), it would be a moment of joy for all of us at the same instant. Well, yeah, for American’s, it will be the Fall or Autumnal Equinox. I hope you know the exact reason behind it.

That’s it for this post. If you like this article, share it if you like, like it if you share it. You can also find us on Mix,Twitter,Pinterest, and Facebook. Hey man, If you have come this far, do give us feedback in the comment section. It would make my day. Cheers!!!

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Categories Astronomy, SeasonsTags Earth Science, Equinox, First Day of Spring, First Day of Spring in Southern Hemisphere, Nature, Seasons, September Equinox, Southern Hemisphere, Southward Equinox, Spring in Australia, Spring in Southern Hemisphere, Vernal Equinox
Atul Sinha

I am a mechanical engineer by profession. Just because of my love for fundamental physics, I switched my career, and therefore I did my postgraduate degree in physics. Right now I am a loner (as ever) and a Physics blogger too. My sole future goal is to do a Ph.D. in theoretical physics, especially in the field of cosmology. Because in my view, every aspect of physics comes within the range of cosmology. And I love traveling, especially the Sole one.

...

Источник: https://physicsinmyview.com/2021/07/first-day-of-spring-southern-hemisphere.html

When is the first day of spring 2019 and the date of the Spring Equinox?

Snowdrops and crocuses are bursting into life in Birmingham's parks and gardens, signalling that spring is upon us.

The sight of snowdrops , which usually appear in late January and early February, is usually a clue that winter is at an end.

And spring 2019 will be especially significant as it will see the arrival of Meghan Markle's first baby - at the end of April or beginning of May - and the UK's scheduled exit from the European Union on March 29.

Spring is also when Mother's Day and Easter take place.

So when is the first day of spring 2019?

When is spring 2019?

Confusingly, there are two different dates for spring.

Meteorologists divide the year into four, based on average temperatures, to determine the seasons.

Under that definition, spring in the UK is March, April and May, so it begins on March 1 and ends on May 31. The other seasons are: summer (June, July, August), autumn (September, October, November) and winter (December, January, February).

This makes it easy for the Met Office and other weather experts to compare data from year to year.

The seasons according to meteorologists
Read More
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However, astronomers determine spring in a different way, based on the Spring Equinox caused by the tilt of the Earth in its movement around the Sun. This date varies from year to year.

At the Spring Equinox, the equator is the closest part of Earth to the sun. Daylight and night are of equal length on this day.

In 2019 this is March 20.

The day of the Spring Equinox is said by astronomers to be the first day of spring. After that, days get longer as we head towards summer.

As is the case in 2019, astronomical spring is around three weeks after meteorological spring.

Read More
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Источник: https://www.birminghammail.co.uk/whats-on/whats-on-news/when-first-day-spring-2019-15836839

The first day of spring is finally here — for about 90% of us. Here's why equinoxes mark the changing of seasons.

  • This year's spring or vernal equinox will happen on Wednesday, March 20.
  • Earth's rotation does not cause the spring equinox. Rather, equinoxes occur because the planet has a tilted axis.
  • Spring comes when the sun's warming rays line up perpendicular to Earth's axial tilt.
  • During an equinox at Earth's equator, the sun appears almost directly overhead.

The year's spring equinox, also called the March or vernal equinox, falls on Wednesday at precisely 5:58 p.m. ET, according to the National Weather Service.

This astronomical event signals the arrival of spring, winter's end, and the trend toward increasingly warm and bright days that come with the pending arrival of summer.

At least, that's the case for people who live in Earth's northern hemisphere, which roughly 90% of all human beings call home. (Blame Earth's shifting land masses for that fun fact.)

For those in the southern hemisphere, the milestone marks the official beginning of fall. The days down under are growing shorter, the weather is cooling off, and sunlight is growing dimmer as winter approaches.

What drives these all-important seasonal shifts? Technically, two things: Earth's tilted axis and the planet's orbit around the sun.

How the spring equinox works

The Earth orbits the sun once every 365 days and 6 hours. Our planet also rotates once per day around a tilted axis.

That tilt is about 23.5 degrees (for now), which means different parts of the world get bathed with various intensities of light over the course of a year. Meanwhile, the planet's rotation keeps the heating even, sort of like a 7,917-mile-wide rotisserie chicken made of rock and a little water.

The spring equinox occurs when the sun's warming rays line up perpendicular to Earth's axial tilt:

Earth during equinox
Shayanne Gal/Business Insider

If you stand directly on the equator as the equinox peaks, the sun will appear more or less directly overhead. Your shadow will also be at its absolute minimum. The sun sets and rises roughly 12 hours apart, too.

But this moment won't last, since the Earth makes its way around the sun at a speed of roughly 66,600 mph.

Uneven seasons

Our planet's orbit is elliptical and its center of gravity slightly offset from the sun, so the time it takes to cycle through the seasons isn't perfectly divvied up.

Read more: The speed of light is torturously slow, and these 3 simple animations by a scientist at NASA prove it

About 92 days and 19 hours after the spring equinox, the Earth will reach its summer solstice — when the most direct rays of the sun reach their northernmost latitude, called the Northern Tropic (or Tropic of Cancer). Another 93 days and six hours later, the fall or autumnal equinox will occur.

Then it's another 89 days and 19 hours to the winter solstice — when the most direct sunlight strikes the Southern Tropic (or Tropic of Capricorn) — and another 89 days to get back to the spring equinox.

Earth equinoxes and solstices graphic
Shayanne Gal/Business Insider

The animation below, from NASA's Goddard Space Flight Center, shows this seasonal progression.

It was created using geosynchronous satellite images taken over Africa; such satellites fly around Earth in a geosynchronous orbit, which means they move fast enough to hover above one spot on the planet.

This creates a great opportunity to photograph Earth over the course of the year and see how the the angle of sun changes.

Take a look:

The truth about the egg-balancing trick

That whole business of only being able to balance an egg on-end during a solstice is a myth. You can balance an egg any time you please, thanks to very small pores in its shell.

Those pores create nearly invisible dimples in the shell upon which a (very, very) patient person can stand up the egg.

Don't look for any gravitational interplay between Earth and the sun to help you out either; that's far too weak to make a noticeable difference.

This is an updated version of a story that was originally published on March 19, 2018.

Источник: https://www.businessinsider.com/when-is-first-day-of-spring-march-equinox-2019-03
1st day of spring 2019 usa

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