GMT
Definition
- 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
-
the local time at the 0 meridian passing through Greenwich, England; it is the same everywhere
Khám phá thêm
Các từ liên quan
Từ đồng nghĩa