ZULU time

n. universal time, Greenwich Mean Time, Coordinated Universal Time

Coordinated Universal Time (UTC) is a high-precision atomic time standard. UTC has uniform seconds defined by International Atomic Time (TAI), with leap seconds announced at irregular intervals to compensate for the earth's slowing rotation and other discrepancies. Leap seconds allow UTC to closely track Universal Time (UT), a time standard based not on the uniform passage of seconds, but on the Earth's angular rotation.
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Synonym Coordinated Universal Time . Formerly a synonym for Greenwich Mean Time .

Coordinated Universal Time

Greenwich Mean Time. 1/9/69

Heure du méridien de Greenwich. 1/9/69