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International Date Line

The International Date Line is a line of longitude roughly located at 180 degrees. It marks the two different days on Earth, where 24 hours is added or subtracted when one crosses the line.

692 Questions

Why do you lose a day traveling east on the International Date Line but gain one going west?

You do not lose a day if you go from March 12 to March 11. You get to live March 11 again.

What country is exactly 12 hours ahead of Colorado US?

Discounting Daylight Saving Time, primarily Pakistan, Tajikistan, Kyrgyzstan, Turkmenistan, Uzbekistan, and parts of Kazakhstan and Russia are 12 hours ahead of Mountain Standard Time.

Where does the day start?

Every day starts at the International Date Line and then moves westward from there across time zones.

What are facts about the International Date Line?

  • The IDL was originally defined as the line of longitude at 180 degrees (east and west converge there). This longitude is the other half of the Great Circle that contains the Prime Meridian, also called the Greenwich Meridian.
  • There is no international authority that requires any nation to observe the standard defined location of the IDL.
  • Some nations including the US and Russia have moved the IDL so that regions near it are technically experiencing the same date, in synch with the ordinary cycles of day and night.
  • The island nation of Kiribati famously shifted the IDL 30 degrees west, the equivalent of two time zones, so that it would by definition have the site of land, Caroline Island, that would first experience January 1, 2000, the day popularly and erroneously thought to be the start of the new millennium.
  • If you are at a place where the IDL crosses over land [only in Antarctica, I believe] you can straddle the line, and half of you will be in one day, and the other half of you will be in another day.
  • If you stand there for any number of days, this will be true every single moment that you stand there, even at midnight, when both of your halves will advance by one day at exactly the same moment.
  • However, if at the moment of midnight you pass over the IDL from west to east, you will NOT change dates, but enter the day you were in when you were on the west side.
  • You could experience the same calendar day for a full 48 hours before you would have no choice but to enter a later day.

Swiss International Air Line cargo prise?

Swiss Air Line offers many different cargo prices depending upon your destination. For 100kgs from JFK-ZRH you could figure $1.40kg plus fuel & security surcharge.

10 am PST equals what time in Africa?

10 AM Pacific Standard Time

  • = 6 PM Greenwich Mean Time (Burkina Faso, Côte d'Ivoire, Gambia, Ghana, Guinea, Guinea-Bissau, Liberia, Mali, Mauritania, São Tomé and Príncipe, Senegal, Sierra Leone & Togo)
  • = 6 PM Western European Time (Morocco & Western Sahara)
  • = 7 PM Western European Summer Time (Morocco & Western Sahara)
  • = 7 PM Central European Time (Algeria & Tunisia)
  • = 7 PM West Africa Time (Angola, Benin, Cameroon, Central African Republic, Chad, Congo, D.R.Congo, Equatorial Guinea, Gabon, Namibia, Niger & Nigeria)
  • = 8 PM West Africa Summer Time (Namibia)
  • = 8 PM Eastern European Time (Egypt & Libya)
  • = 8 PM Central Africa Time (Botswana, Burundi, D.R.Congo, Malawi, Mozambique, Rwanda, Zambia & Zimbabwe)
  • = 8 PM South Africa Standard Time (Lesotho, South Africa & Swaziland)
  • = 9 PM Eastern European Summer Time (Egypt)
  • = 9 PM East Africa Time (Djibouti, Eritrea, Ethiopia, Kenya, Somalia, South Sudan, Sudan, Tanzania & Uganda)

If it is t Tuesday morning west of the international date lineeastern hemisphere then what day is it east of the international date line western hemisphere?

When you cross the IDL from east to west ... like going from the US to Japan ... you move your

watch and calendar to read a day later. You skip over 24 hours, and you 'lose' them.

When you cross it going from west to east ... like toward the US and Canada from Asia ... you move

your watch and calendar to read a day earlier. You get to live the same 24 hours all over again, so

you 'gain' a day.

Why are some dates marked with a c on a time line?

A c means circa or around, so when an event is shown as c150 BC, it means it happened around 150 years Before Christ.

What is the impact of crossing the international dateline east to west?

When you cross the International Dateline while traveling from east to west,

then at some convenient time before you reach your destintion, you must

crank your calendar wristwatch forward 24 hours, and tear an extra daily page

off of your desk calendar. If you forget to do this, then once you land, everyone

you meet there will disagree with you on the date. They'll all say that your clock

and calendar are way slow, that you are stuck in yesterday, and that it's actually

a day later than you think it is. This could be especially awkward if you think it's

Saturday and everybody around you is heading for Church.

Is an issue date an expiry date?

No. Issue date is when it was made or introduced for sale. Expiration date is when it is no longer fit to be sold.