International Date Line

We were going along fine there until we got almost to the end of the question.

That's where we found that you too are one of the huge number of people who

thinks that there's a standard set of "lines".

There isn't. Some maps and globes have some lines of constant latitude and

longitude printed on them, and some don't. The ones that do may have them

printed every 45 degrees, or every 30 degrees, or every 20, 15 or 10 degrees.

It's completely up to the publisher of the globe or the map. The mapping software

that I use will print a line every 2 seconds of longitude if I want them. That would

be 648,000 lines of longitude around the world.

If the International Date Line had not been zigged and zagged to avoid splitting

states, countries, or islands into two different calendar dates, it would have

exactly followed the meridian of 180 degrees longitude ... directly opposite the

Prime Meridian and 180 degrees away from it, both east and west.

No, Singapore is in the Singapore Time Zone, which is UTC+8, while Beijing is in the China Standard Time Zone, which is also UTC+8. However, they may have different local times because of Daylight Saving Time adjustments or slight geographical differences.

Samoa is located just east of the International Date Line. This positioning is significant because in 2011, Samoa shifted to the west of the date line to align its time zone with other Pacific islands.

See related link for more information. _________ The Prime Meridian is based on Greenwich, England, the longitude of which is 0 degees. The other meridians are calculated from the Prime Meridian. Knowing where you are in relation to the Prime Meridian is the basis of all nautical navigation which was the reason for its establishment.

The specific origin and destination locations are irrelevant. The only fact that

matters is in which direction you're traveling when you cross the Date Line.

If towards the west, as when traveling from the Cook Islands to New Zealand,

then you're to add one day to the date on your calendar or your wristwatch.

Thus, your time has suddenly become 24 hours later than it was a moment ago.

In effect, you've 'lost' a day.

The SAT is administered in multiple time zones around the world, with test centers following local time. Check your admission ticket to see the specific time and location for your SAT exam.

The time difference between Paris, France, and Belfast, Northern Ireland is one hour. Paris is one hour ahead of Belfast.

New Zealand ranges in longitude between roughly 166.47° East to 178.55° East.

Longitude is measured from the Prime Meridian, so those are the angles

if you start at the Prime Meridian and travel eastward.

Traveling westward from the Prime Meridian, the corresponding angles

are 181.45° and 193.53° .

Throughout almost the past 2 centuries, thousands of cruise ships, cargo ships,

tankers, and a few intrepid solo adventurers have crossed the mid-Pacific, totaling

many thousands of passengers. On alerts from the ships' navigating officers that

long ago became a seafaring tradition, passengers are always notified when a

vessel is about to cross the International Date Line, and they typically flock to the

rails to look for it. Except on the darkest nights, or on the days when the sea is most

turbulent, crowds of people routinely see the line, black and straight and only a few

feet beneath the surface, as the ship glides silently across it and the ship's chronometers

trip in unison to the next or previous day, depending on their direction of travel.

So many sea travelers through a continuous period of almost 200 years have seen the

line, and have even raised a glass and toasted it with their fellow travelers at the

instant of the crossing, that its existence is now common knowledge on the sea, and

no shred of doubt remains in the mind of anyone who has personally traveled by sea,

or who knows anyone who has. In our day, the existence of the line has been confirmed

by thousands of witnesses, sound of body, mind, and sight, no less than that of the

ocean itself.

That's done in order to avoid having any single state, country, or island

split by the date line. If it exactly followed the 180-degree meridian, then

the state of Alaska and the Pacific island nation of Kiribati, among others,

would always have two different calendar dates within the same small area.

That would certainly make for some difficult conditions for normal business

and everyday living.

Nothing special happens. If the flight crew didn't tell you about it, you wouldn't

notice anything. It's handy to know about it, though, because when you cross

the IDL traveling east, you're supposed to turn your watch and your calendar

back a day.

Tonga, while physically located in the Western Hemisphere, is actually considered in the Eastern Hemisphere for purposes of calculating the date. The international date line, which normally runs along the 180th line of longitude, swings in an easterly direction around Tonga and then back to the 180th line of longitude.

That point is in the water of Suva Harbor, about 0.45 mile
off the shore of Suva, on the island of Fiji.

The International Date Line closely follows the 180-degree meridian. It is an imaginary line that determines where one day ends and the next begins. When crossing the International Date Line from east to west, you 'lose' a day, and when crossing from west to east, you 'gain' a day.

The International Date Line is also known as the "line of demarcation." It marks the boundary between two consecutive calendar days. When crossing the line from east to west, a day is subtracted, and when crossing from west to east, a day is added.

No. Your watch isn't reading the time of the place where you are, and the date

didn't change at the place whose time your watch is reading.

However, should you ever become interested in knowing the time and date in the

place where you are, then you'll need to look at your watch and do some translating.

You'll need to know how many hours from UTC the place is where you happen to be,

and you'll also find it very useful to ask someone the date, if you haven't kept track

of it along the way.

Kiribati Although, in 1995 Kiribati by law changed the date for its eastern half, effectively moving the date line to the east of this country. Not everyone recognizes this change, however. It's important to keep in mind that while Kiribati made a controversial move (making Caroline Island the first place on earth to enter the 21st century) there is in fact no international law that binds any nation to observe the conventional or any particular definition of the date line. Russia and the US define the date line in such a way that there is not a part of the nation permanently isolated a day ahead (or behind) the rest of the nation. But the original date line as defined is 180 degrees longitude. It happens to be a fortunate coincidence that the meridian opposite 0 degrees passes mostly over vast stretches of ocean.

That's like asking: What is the interval in feet between the heights allowed for adults ?

There is no standard set of 'lines' that's allowed, and you have to choose one that's

close to what you need. Latitude and longitude are measurements of position.

Every point on earth has its own latitude and longitude. If I give you the

numbers for one point, and you go to a different point, then your point has

different latitude or longitude, or both. A good surveyor can measure the

latitude and longitude of a point with enough precision to tell it apart from a

different point that's a few millimeters away.

What's the interval in inches between the lines on a ruler ? Usually they're one inch

apart, but does that mean we're not allowed to talk about measurements of things

that don't come out to be whole inches ? Of course not. The only reason there aren't

more lines on a ruler is that it would be harder to read.

Some maps and globes are manufactured with a line printed for every 15 degrees.

Others have a line every 10 degrees. I have a set of maps with a line printed for

every 0.0083 degree, and a set of street maps on my computer that will give me

a line every 0.0013 degree if I want it.

There's no reason the publisher could not print a line every 0.1 degree on the world map,

except that the entire worls map would then be solid black and you wouldn't be able to

see the places under the lines.

The lines are only a convenience, to show you approximate intervals, and then let you

estimate other values between the lines. Just like the lines on a ruler.

No. Greenwich Mean Time is the timezone located along the Prime Meridian, 0º longitude. The International Date Line is on the exact opposite side of the earth at 180º, with some variance. The International Date Line is 12 hours away from Greenwich Mean Time in many areas.

As of 2021, there are over 39,000 McDonald's restaurants worldwide. McDonald's is one of the largest fast-food chains globally, with locations in numerous countries.

The dip of the Earth's magnetic field varies because the field is not perfectly uniform and is influenced by the local geology of each region. Changes in the magnetic properties of the Earth's crust, as well as the distribution of magnetic minerals, can cause variations in the magnetic field strength and direction, resulting in different dip angles at different locations around the world.

When you cross the IDL, you turn your calendar one whole day, either forward

or backward depending on what direction you're traveling.

If you're traveling westward, with the US behind you and Japan in front of you, turn

your calendar forward a day when you cross the line, and skip 24 hours.

If you're traveling eastward, with China behind you and Canada in front of you, turn

your calendar back a day when you cross the line, and repeat the previous 24 hours.

The International Date Line marks the boundary between two consecutive calendar days, creating a difference in time of up to 24 hours. This imaginary line generally follows a meridian of longitude in the Pacific Ocean and helps account for the Earth's rotation and time differences across the globe.

There is no time zone 23 hours ahead of Alabama.