Question

cant understand international date line

Answer 1

The International Date Line serves as the "line of demarcation" between two consecutive calendar dates. ... TheInternational Date Line, established in 1884, passes through the mid-Pacific Ocean and roughly follows a 180 degrees longitude north-south line on the Earth.



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Answer 2

In reality, nothing. The line marks a decided upon place where two of our imaginary dates meet. On one side, regardless of the position of the Sun in the sky it is one day, and on the other it is the next day.

Two people could be standing on the dateline on the coastline of Antarctica (the only dry land place on the line) holding hands even with the Sun high overhead and officially be in two days at once.

I wonder if anyone has actually done this. Hmm.

The dateline is important though, because the planet is spherical and turns at 1000 miles per hour. The Earth is roughly 24,000 miles around, so time zones are about 1000 miles wide, though due to political demand they sometimes break the rules, by being half an hour or a quarter hour behind or ahead.

Then there's Kiribati. Its easternmost islands are on the same longitude as Alaska and Hawaii in the Western Hemisphere, but because their capital is in the Eastern Hemisphere, and they didn't want their country to be split by a day, they simply decided to be on the west side of the line, creating a 25th hour in the day. They celebrate New Years a full day before Hawaii.

Now, unknown to most, there's another international dateline. It marks midnight. Every hour it skips ahead 1000 miles westward. Looking down on the North Pole it moves clockwise. This is the Terminal Hour, where Monday becomes Tuesday.

At Kiribati every day at midnight, there are actually three days on Earth at the same time for one hour.

When it's still Monday in the Midway and Aleutian Islands, it's already Wednesday in Kiribati.

"Merrily, Merrily, merrily… Life is but a dream."

or--------------read this---------

If you travel around the world, changing standard time by one hour each time you enter a new time zone, then a complete circuit would mean that you adjusted your clock or watch time by 24 hours.

The International Date Line runs down the middle of the Pacific Ocean. If you cross the date line moving east, you subtract a day, whereas if you are moving west you add a day. For example, if today is Friday and we crossed the International Date line from west to east then it would be Thursday. If we went east to west it would be Saturday

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