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Which of the following statements is/are correct regarding the International Date Line? (1) The International Date Line is an imaginary longitude that serves as the line of demarcation between two consecutive dates.  (2) It is located Halfway from the Prime Meridian or Greenwich Meridian.  (3) It curves from the normal 180 degree Meridian at the Bering Strait to avoid confusion of day and date.  (4) The time difference between either side of the International Date Line is exactly 24 hours. 

Which of the following statements is/are correct regarding the International Date Line? (1) The International Date Line is an imaginary longitude that serves as the line of demarcation between two consecutive dates.  (2) It is located Halfway from the Prime Meridian or Greenwich Meridian.  (3) It curves from the normal 180 degree Meridian at the Bering Strait to avoid confusion of day and date.  (4) The time difference between either side of the International Date Line is exactly 24 hours.  Correct Answer 1, 2 and 3

The correct answer is 1, 2, and 3.

Key Points

  • International Date Line is also known as the line of demarcation as it separates two consecutive calendar dates. Hence, statement 1 is correct.
  • It is an imaginary longitude located at about 180 degrees east or west from the Greenwich Meridian. Hence, statement 2 is correct.
  • It is not straight and curves from the normal 180 degrees Meridian at the Bering Strait, Fiji, Tonga, Aleutian Islands, Kiribati Islands, Wrangel Island, etc. to prevent confusion of day and date. Hence, statement 3 is correct.
  • The time difference between either side of the international date line is not always 24 hours because of uncertainties due to local time zone variations. Hence, statement 4 is incorrect.
  • Date changes when one crosses it. 
  • If one crosses the dateline moving east, then one has to subtract a day. 
  • Whereas if one is moving West then one has to add a day.

Additional Information

  • ​​​​The Equator is an imaginary line that divides it into two equal parts.
  • The angular distance of a place from the equator is termed as latitude.
  • The angular distance of a place from the Prime Meridian is termed as Longitude.
  • The meridian which passed through Greenwich (British Royal Observatory) is called Prime Meridian.

Related Questions

With reference to the Bering Strait, consider the following statements: 1. Bering Strait links the Arctic Ocean with the Bering Sea and separates the continents of Asia and North America. 2. The International Date Line in the mid-Pacific curves from the normal 180 degrees meridian at the Bering Strait. Which of the statements given above is/are correct?
Consider the following statements: 1. A traveller crossing the International Date Line from east to west gains a day and while crossing the dateline from west to east he loses a day. 2. The International Date Line I the mid-Pacific curves from the normal 180-degree meridian at the Bering Strait, Fiji, Tonga and other islands to prevent confusion of the day and date in some of the groups that are cut through by the meridian.  Which of the statements given above is /are correct?
Which one of the following four addresses is NOT EXACTLY the same as the one given below? Private Bag X86, Halfway House, Number-1685, S. Africa i. Private Bag X86, Halfway House, Number-1885, S. Africa ii. Private Bag X86, Halfway House, Number-1685, S. Africa iii. Private Bag X86, Halfway House, Number-1685, S. Africa iv. Private Bag X86, Halfway House, Number-1685, S. Africa
Which of the following statements regarding the International Date line are correct?
1. It is a longitude of 180°
2. It is determined by 180° longitude but is not a straight line
3. It is a Greenwich meridian helping in fixing time and date
4. It solves the problem of time and date among the World's nations
Which of these statements are correct?
1. Prime Meridian passes through Greenwich and is at 0° Longitude.
2. International Date Line, on the map appears as a straight line along 180° Longitude.
3. While crossing International Date Line from east to west, one gains a day.
4. Tropic of Cancer lies at Latitude.
Which of the following is/are true of world time zones? I. The world is divided into thirty time zones II. All time zones of the world are described in term of the number of hours difference between the standard meridian of that zone and the Greenwich Meridian III. All countries have more than one time zone IV. The time for all places east of Greenwich is designated slow, and time for all places left of Greenwich is designated fast
Which of the following is/are true of world time zones?
I. The world is divided into thirty time zones
II. All time zones of the world are described in term of the number of hours difference between the standard meridian of that zone and the Greenwich Meridian
III. All countries have more than one time zone
IV. The time for all places east of Greenwich is designated slow, and time for all places left of Greenwich is designated fast
Indifference curves relating to supply of labour have a number of properties some of which are mentioned below
1. Indifference curves are downward slopping
2. Indifference curves are upward slopping
3. Higher indifference curves indicate lower levels of utility
4. Higher indifference curves indicate higher levels of utility
5. Indifference curves do not intersect
6. Indifference curves intersect
7. Indifference curves are concave to the origin
8. Indifference curves are convex to the origin
Which among the following properties are not true?
Which of the following statements is/are correct?
1. A crossing of the International Date Line entails repeating one day when traveling westwards
2. A crossing of the International Date Line entails repeating one day when traveling eastwards
3. International Date Line is an internationally agreed line drawn parallel to the 180° meridian
4. International Date Line divides the Pacific Ocean into two equal parts.
In the question below, are given a statement followed by three courses of actions numbered I, II and III. On the basis of the information given, you have to assume everything in the statement to be true, and then decide which of the suggested courses of action logically follow(s) for pursuing. Statement: With just two days to go for the second edition of Amazon Prime Day, the e-commerce giant has been keeping its loyalists busy with a seven-day entertainment marathon. Started on July 10 with the release of Amitabh Bachchan starrer '102 Not Out', Amazon has been dropping one title every day for its Prime members. With Video and Music, Amazon clearly wants to showcase that Prime day is not merely about products. Courses of action: I. Building on the success of its previous sales, Amazon is gearing up for a bigger event, with extra perks for its Prime members in the form of quality video and music content - and not just early access and quicker deliveries. II. Started on July 3, Prime members who play three songs from the millions on Amazon Prime Music stand a chance to win an Echo Dot every day, with two winners announced daily. III. With Raazi and Transformers: The Last Night slated for release in the next two days, members already have access to Dunkirk, Telugu hit Officer as well as Prime Original show, Comicstaan - a reality TV show to find India's next stand-up comedy star.