Question

if we move from the right to the left of 180 degree longitude we gain or lose a day

Answer 1

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✧☞Thus, the 180-degree line of longitude, exactly one-half way around the planet from Greenwich, England (at 0 degrees longitude), is approximately where the international date line is located. Cross the line from the east to the west, and you gain a day. Cross from west to the east, and you lose a day.

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