The International Meridien Conference of 1884 established Greenwich Mean Time, referring to the mean solartime at the Royal Observatory in Greenwich, near London.
1884年,国际子午线大会确立了格林威治标准时间(GMT),即伦敦附近的格林威治皇家气象台(the Royal Observatory in Greenwich)的平均太阳时间。
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Greenwich mean time (GMT) is mean solartime at the Royal Greenwich Observatory in Greenwich, London, England, which by convention is at 0 degrees geographic longitude.