The International Date Line passes through the Pacific ocean where there are no landmasses. It follows 180° meridian for most of its distance. The dateline is zig-zag in some places to avoid the confusion of time on the same island. It avoids some islands and deviates from 180°.
The IDL is at 180 degrees longitude, not because it is just opposite to prime meridian but because it passes majorly through the oceans. The IDL is intentionally made so that it doesn't pass from any country's landmass, and the problem of two different dates in one country does not arise.
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Answer:
The International Date Line passes through the Pacific ocean where there are no landmasses. It follows 180° meridian for most of its distance. The dateline is zig-zag in some places to avoid the confusion of time on the same island. It avoids some islands and deviates from 180°.
Answer:
The IDL is at 180 degrees longitude, not because it is just opposite to prime meridian but because it passes majorly through the oceans. The IDL is intentionally made so that it doesn't pass from any country's landmass, and the problem of two different dates in one country does not arise.
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