The international date line is often simply called the date line. The date line is marked by a big sign with a map in the island. The International Date Line sits on the 180º line of longitude in the middle of the Pacific Ocean, and is the imaginary line that separates two consecutive calendar days. It is not a straight line, however. Though the times on either side of the line are close to each other, the date on the west side is a day ahead of the date on the east side. When it is one calendar day (for example, January 1st) in places to the east of the line, it is the next calendar day (January 2nd) in places to the west. The International Date Line is established by international agreement and there are no treaties or formal agreements associated with the line. This is to account for the many time zones around the world to make it easier for people to know what time it is in various countries and to keep days uniform based on daylight hours. The International Date Line (IDL) passes through the Pacific Ocean. Also, the International Date Line (IDL), creates 3 time zones and several time zones are only 30 and 45 minutes apart. Oct 09 2003, 6:01 AM FREE! Samoa has skipped today, December 30, and gone straight to Saturday after shifting the international date line. The standard time of each zone is the mean astronomical time of one of 24 meridians, 15 degrees apart, beginning at the Greenwich, England, meridian and extending east and west around the globe to the International Date Line. Meaning of international date line. international date line, imaginary line on the earth's surface, generally following the 180° meridian of longitude longitude, angular distance on the earth's surface measured along any latitude line such as the equator east or west of the prime meridian. THE ARCTIC CIRCLE (AP) — The international date line is an imaginary border that runs through the middle of the Pacific Ocean and marks the boundary between calendar dates, effectively making it the zero-line for the planet's time zones. It describes the border from one day to the next. However, the actual borders on the time zone map have been drawn to match up with both internal and international borders, and rarely match up exactly with the 15-degree longitudes. About This Quiz & Worksheet. Traveling eastward across the line, one subtracts one calendar day; traveling westward, one adds a day. It’s out there in the middle of the Pacific Ocean, the place where today becomes tomorrow and where yesterday is really today. The Diomede Islands are a pair of rocky islands located in the middle of the Bering Strait between mainland Alaska and Siberia. The International Date Line (IDL), also known as just the Date Line, is an imaginary line on the surface of the Earth, going from north to south in the Pacific Ocean.The date becomes one day later as one travels across it in western direction, and one day earlier as one travels across it in eastern direction. international date line, imaginary line on the earth's surface, generally following the 180° meridian of longitude, where, by international agreement, travelers change dates. International Date Line synonyms, International Date Line pronunciation, International Date Line translation, English dictionary definition of International Date Line. While the IERS Reference Meridian is maintained by the IERS, the International Date Line is not maintained at all: any of the adjoining countries can change it by changing their time zones. As we go towards east from the International Date Line, we are reducing one day from our prior location in the west. The International Date Line is an imaginary line on the surface of the Earth that sits mostly on the 180º line of longitude in the middle of the Pacific Ocean.. Because the world is split into many different time zones, the establishment of an International Date Line is beneficial to understanding how time is delineated. The date line curves around several landmasses. It arbitrarily demarcates each calendar day from the next. The International Date Line passes through the Line Islands. The International Date Line is one of those travel destinations that often eludes even the hardiest of travelers. The International Date Line, also called the Date Line, is an imaginary line extending between the North Pole and the South Pole. It has been recognized as a matter of convenience and has no force in international law. Some groups of Islands (Polynesia, Melanesia, Micronesia) fall on either of the dateline. Earth's surface was divided into 24 zones. It is not a perfectly straight line and has been moved slightly over the years to accommodate needs … The time difference on either side of this line is 24 hours. So, the date changes as soon as one crosses this line. That is the date in the Eastern hemisphere , to the left of the line, is always one day ahead of the date in the Western hemisphere [hemiplane]. It is an imaginary line, like longitudes and latitudes. If we calculate by latitude, each minute is 1/60th of a degree, i.e. Sure there's only so many times you can jump between today and yesterday, and you might be wondering if … International date line definition, a theoretical line following, with occasional deviations, the antimeridian, the regions to the east of which are counted as being one day earlier in their calendar dates than the regions to the west. The Line Islands that are part of Kiribati are in the world's farthest forward time zone, UTC+14:00. It was officially 1 established in 1884 at the International Meridian Conference in Washington, D.C. for the sole purpose of differentiating between days on the Gregorian calendar . The date line runs from the North Pole to the South Pole through the Pacific Ocean. The International date line is a fictive line describing boundaries of time zones (roughly round 180° longitude) with time zone differences of roughly one day. The International Date Line is located at 180 degrees east or west of the Greenwich Meridian and is an imaginary line of longitude that differentiates between two different days. It separates the Eastern and Western Hemispheres). While such a concept had existed for centuries, it wasn't until 1884 that the line was formally agreed upon at an international conference in Washington, … The International Date Line (IDL), also known as just the Date Line, is an imaginary line on the surface of the Earth, going from north to south in the Pacific Ocean.The date becomes one day later as one travels across it in western direction, and one day earlier as one travels across it … The International Date Line is the imaginary line on the Earth that separates two consecutive calendar days. The International Date Line lies on the opposite side of the world to the Prime Meridian (The Prime Meridian passes through Greenwich in London. International date line definition is - an arbitrary line approximately along the 180th meridian designated as the place where each calendar day begins. Arbitrary line approximately along the 180th meridian designated as the place where each calendar day.... 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