"The correct answer is Bering Strait. Key Points The International Date Line passes through the Pacific and Arctic Oceans. It corresponds along most of its length to the 180th meridian of longitude but deviates eastward through the Bering Strait to avoid dividing Siberia and then deviates westward to include the Aleutian Islands with Alaska.  Important Points The International Date Line is an imaginary line of demarcation on the surface of Earth that runs from the North Pole to the South Pole and demarcates the change of one calendar day to the next. It passes through the middle of the Pacific Ocean, roughly following the 180° line of longitude but deviating to pass around some territories and island groups. The date becomes one day later as one travels across it in the western direction, and one day earlier as one travels across it in the eastern direction.  Additional Information The Strait of Gibraltar, also known as the Straits of Gibraltar, is a narrow strait that connects the Atlantic Ocean to the Mediterranean Sea and separates the Iberian Peninsula in Europe from Morocco in Africa. The Straits of Florida is a strait located south-southeast of the North American mainland, generally accepted to be between the Gulf of Mexico and the Atlantic Ocean, and between the Florida Keys and Cuba. The Strait of Malacca or Straits of Malacca is a narrow stretch of water, 580 miles in length, between the Malay Peninsula and the Indonesian island of Sumatra."

"The correct answer is the Pacific Ocean.Key Points  The International Date Line passes through the Pacific ocean.​  The International Date Line(IDL) The international date line is an imaginary line that passes through the Pacific Ocean Along with the IDL, the date changes by exactly one day when it is crossed. A traveler crossing the dateline from West to East gains a day while crossing the dateline from East to West loses a day. Why there is a gain or loss of day? 180o E is GMT +12hrs and 180o W is GMT -12hrs, hence the difference between 180o E and 180o W is 24hrs. That is time difference on either side of IDL is 24hours, so the date changes as soon as one crosses IDL. Why it passes through the water body only? If the IDL passes through the land, then two regions of the same Island country or Island group would fall under different date zones. Thus, to avoid any confusion of date, IDL is drawn from the water body only, that's why it is in the Zig-zag manner. Additional Information​Oceanic current in respective oceans Pacific Ocean Warm current Cold current Kuroshio Oyashio North pacific California East Australian Humboldt Atlantic Ocean Warm current    Cold current Gulf Stream Labrador North Atlantic Canary Brazil Current Falkland   Indian Ocean Warm current      Cold current Aghulas western Australia North Equatorial South Equatorial"

It's not coincidence, but it's also not a fact of geography either. Date lines, like time zones, are arbitrary constructs built upon the fact that time is different on different parts of the planet -- I've written about this before, a couple times, but this knowledge was, er, known in classical antiquity . Part of the reason that the Prime Meridian was set at Greenwich, where many a shrew is in , is that the opposite side of the Earth from there is mostly the Pacific. But if you look at a map of the IDL, , you'll notice that the IDL writhes around many places to accommodate local time and timekeeping needs -- for example, Kiribati and Samoa have in recent years moved their time zones to accommodate either unity in the country, or in Samoa's case, to align their business weeks more precisely with their major trading partners in Australia and New Zealand. This of course isn't unique to the IDL -- even time zones in America are divided up rather arbitrarily; in the Plains states the distinction between Central and Mountain time affects relatively few people, but the Central/Eastern time zone split in Indiana, Kentucky, and Tennessee gives people fits from time to time. Moving to why the Prime Meridian was set at Greenwich, a major problem of railway scheduling in the 1850s and onward was that trains were relatively fast -- speaking of America, they could cross the continent in enough time that they would run into one another if there were not conversions for local time and "time zones" like we have today. The result of the International Meridian Conference in 1884 was fairly pre-ordained, with the prime meridian being at Greenwich being accepted by the Anglophiles at the conference, due at least partially to the prominence of the British navy and its influence on navigation on the terraqueous globe. (To be extremely technical about it, the current International Reference Meridian is slightly to the east of Greenwich, due to variances in local gravity; also, to be less technical about it, the Earth is kind of lumpy and doesn't rotate at a steady rate, so leap-seconds are sometimes inserted to keep clocks in time.)

"The correct answer is option 4) i.e. Bering Strait. Bering Strait links the Arctic Ocean with the Bering Sea and separating the continents of Asia and North America at their closest point. The International Date Line established in 1884, passes through the mid-Pacific Ocean and roughly follows a 180 degrees longitude north-south line on the Earth. When we cross the International dateline from East to West we move up one day and when we cross back the line from West to East we move down one day. The international dateline is a zigzag line. Note: Longitude is defined as imaginary lines called meridians that run from the north to the south pole. There are a total of 360 meridians. The Prime Meridian runs through the Greenwich Observatory in England, the location agreed upon by a conference in 1884 to be 0 degrees."