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what is the longest day of the year called
Summer solstice 2021 on Father’s Day, the longest of the year, marks Earth’s changing seasons
The official start of summer kicks off in the Northern Hemisphere today (June 20), marking the longest day of the year — which also happens to coincide with Father’s Day.
The June solstice will occur at 11:32 p.m. EDT (0332 June 21 GMT), when the sun reaches the point at which it is farthest north of the celestial equator.
Reaching its highest and northernmost point in the sky, the sun must travel its longest path.
meaning it will take longer to rise and to set, which is why today marks the longest day — or longest period of sunlight hours — and shortest night.
In addition, the summer solstice occurs at the moment the northern half of Earth is tilted toward the sun, meaning the Northern Hemisphere receives sunlight at the most direct angle of the year.
At this time, the sun will appear directly overhead for a point on the Tropic of Cancer (latitude 23.5 degrees north).
in the central Pacific Ocean, 817 miles (1,314 kilometers) east-northeast from Honolulu. Conversely, the June solstice marks the beginning of winter in the Southern Hemisphere.
when the sun is at its lowest point in the sky and the southern half of Earth is tilted away from the sun.
what is the longest day of the year called and when does it occur
The timing of the June solstice is based on when the sun reaches its northernmost point from the celestial equator, generally between June 20-22. And this year.
the solstice also happens to fall on Father’s Day! Here’s what skywatchers can expect to see as dads around the world celebrate on Sunday, as well as during the week following the summer solstice.
Beginning Sunday morning (June 20), Mercury appeared above the horizon about 30 minutes before sunrise and may be visible at dawn.
Solstice will occur at 11:32 p.m. EDT (0332 June 21 GMT) Sunday night. However, during the day, viewers in the Northern Hemisphere may experience more than 14 hours of sunlight.
You can use The Farmer’s Almanac Sunrise and Sunset Calculator to determine how many hours of sunlight you’ll get in your location during the solstice.
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Later in the week, viewers will be treated to other skywatching events.
starting Monday night (June 21), when Venus and the bright star Pollux will appear closest to each other (a little over 5 degrees apart).
On Tuesday (June 22), the bright star Antares will appear about 5 degrees below the waxing gibbous moon.
— only shortly before the moon reaches perigee, or its closest approach to Earth in its orbit, on Wednesday (June 23).
Then, on Thursday (June 24), the next full moon, also called the Strawberry Moon, will occur at 2:40 p.m.
EDT (1840 GMT) and appear full to stargazers through early Saturday morning, according to NASA.
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While the June solstice marks the official start of summer and the longest day of the year, it also represents a turning point of the year:
As the sun begins its annual southward migration, the days will start getting shorter once again.
June Solstice: Longest and Shortest Day of the Year
The June solstice is the summer solstice in the Northern Hemisphere and the winter solstice in the Southern Hemisphere.
The date varies between June 20 and June 22, depending on the year, and the local time zone.
In Shiraz, Iran: Tuesday, 21 June 2022, 13:43 IRDT (Change location)
This corresponds to Tuesday, 21 June 2022, 09:13 UTC.
- Sun rise/set and day length around this equinox
- Equinox countdown
- Local times for this equinox worldwide
- Equinox Day and Night Map
Zenith Furthest Away from the Equator
A solstice happens when the sun’s zenith is at its furthest point from the equator.
On the June solstice, it reaches its northernmost point and the Earth’s North Pole tilts directly towards the sun, at about 23.4 degrees.
It’s also known as the northern solstice because it occurs when the sun is directly over the Tropic of Cancer in the Northern Hemisphere.
Meaning of Solstice
“Solstice” (Latin: “solstitium”) means sun-stopping. The point on the horizon where the sun appears to rise and set, stops and reverses direction after this day. On the solstice, the sun does not rise precisely in the east, but rises to the north of east and sets to the north of west, meaning it’s visible in the sky for a longer period of time.
Although the June solstice marks the first day of astronomical summer, it’s more common to use meteorological definitions of seasons, making the solstice midsummer or midwinter.
Solstices in Culture
Over the centuries, the June solstice has inspired countless festivals, midsummer celebrations and religious holidays.
One of the world’s oldest evidence of the summer solstice’s importance in culture is Stonehenge in England, a megalithic structure which clearly marks the moment of the June solstice.
In the Southern Hemisphere, where the June solstice is known as the shortest day of the year, it marks the first day of astronomical winter, but the middle of winter in meteorological terms.
Midnight Sun or Polar Night?
On the June solstice, the midnight sun is visible (weather permitting) throughout the night, in all areas from just south of the Arctic Circle to the North Pole.
Solstice Dates Vary
Even though most people consider June 21 as the date of the June solstice, it can happen anytime between June 20 and June 22, depending on which time zone you’re in. June 22 solstices are rare – the last June 22 solstice in UTC time took place in 1975 and there won’t be another one until 2203.
The varying dates of the solstice are mainly due to the calendar system – most western countries use the Gregorian calendar which has 365 days in a normal year and 366 days in a Leap Year.
A tropical year is the time it takes the Earth to orbit once around the Sun. It is around 365.242199 days long, but varies slightly from year to year because of the influence of other planets. The exact orbital and daily rotational motion of the Earth, such as the “wobble” in the Earth’s axis (precession of the equinoxes), also contributes to the changing solstice dates.
Moving to Other Seasons
After the June solstice, the sun follows a lower and lower path through the sky each day in the Northern Hemisphere until it reaches the point where the length of daylight is about 12 hours and eight to nine minutes in areas that are about 30 degrees north or south of the equator.
Areas 60 degrees north or south of the equator have daylight for about 12 hours and 16 minutes. This is the September Equinox, the Autumnal Equinox in the Northern Hemisphere.
Earth does not move at a constant speed in its elliptical orbit. Therefore the seasons are not of equal length: the times taken for the sun to move from the March Equinox to the June solstice, to the September equinox, to the December solstice, and back to the March equinox are roughly 92.8, 93.6, 89.8 and 89.0 days respectively.
The consolation in the Northern Hemisphere is that spring and summer last longer than autumn and winter.