gmt

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Definition
  1. Noun:
    • Greenwich Mean Time: The mean solar time at the Royal Observatory in Greenwich, London, historically based on the average position of the sun. It is the time at the prime meridian (0° longitude) and serves as a global time standard.
Usage

  • As a Standard Time Reference: GMT is used to coordinate time across different time zones worldwide. It is often used in aviation, computing, and international communications to avoid confusion.

    • All flight schedules are listed in GMT.
    • Please convert your local time to GMT for the meeting.

  • In Formal Contexts: GMT is used in news, scientific publications, and legal documents to specify time unambiguously.

    • The treaty was signed at 15:00 GMT.
    • The satellite launch is scheduled for 10:30 GMT.
Advanced Usage

  • "GMT" vs. "UTC": While often used interchangeably in casual contexts, Coordinated Universal Time (UTC) is a more precise time standard that incorporates atomic clocks. GMT is now often considered a time zone (UTC+0) rather than the definitive global standard.

    • The system timestamp is recorded in UTC, not GMT.

  • "GMT" as a Time Zone Offset: Used to indicate a specific time zone relative to GMT, such as GMT+1 or GMT-5.

    • Berlin is in the GMT+1 time zone during standard time.
Variants and Related Words
  • UTC (Coordinated Universal Time): The primary time standard by which the world regulates clocks and time. It is essentially equivalent to GMT for most common purposes.
  • Zulu Time (Z): A term used in military and aviation contexts to refer to UTC/GMT. The letter 'Z' stands for "Zulu" in the NATO phonetic alphabet.
  • Prime Meridian: The 0° longitude line running through Greenwich, which defines GMT.
Synonyms
  • Universal Time (UT): A broader astronomical time standard based on the rotation of the Earth, of which GMT is one type.
  • Greenwich Time: A less formal synonym for GMT.
Related Phrases
  • "on GMT": Operating or set according to Greenwich Mean Time.
    • The server is set to run on GMT.
  • "GMT offset": The difference in hours and minutes from GMT.
    • Check the GMT offset for your location.
Noun
  1. the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere

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