Differentiate between Greenwich Mean Time and International Date Line.
Differentiate between Greenwich Mean Time and International Date Line.
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Differentiate between Greenwich Mean Time and International Date Line.
Greenwich Mean Time (GMT) is the time at the Prime Meridian, passing through the Royal Observatory in Greenwich, London. It serves as a reference point for time zones worldwide. GMT is used as a standard for coordinating time globally, and it is often the baseline against which other time zones are measured.
The International Date Line (IDL) is an imaginary line on the Earth's surface, mostly following the 180th meridian, where the date changes as one moves east or west across it. Crossing from west to east subtracts a day, and crossing from east to west adds a day. The IDL helps maintain a consistent global timekeeping system and prevents confusion about the date when traveling across longitudes.
In summary, GMT is a standard time reference at the Prime Meridian, while the International Date Line marks the point where the date changes, helping maintain chronological order as one travels east or west.