coordinated universal time: meaning, definition, pronunciation and examples
MediumTechnical, Formal, Official
Quick answer
What does “coordinated universal time” mean?
The primary global time standard by which the world regulates clocks and time, based on atomic timekeeping.
Audio
Pronunciation
Definition
Meaning and Definition
The primary global time standard by which the world regulates clocks and time, based on atomic timekeeping.
An official, highly precise timekeeping system, created by combining atomic clock measurements with astronomical observations (Universal Time, UT1) to account for Earth's irregular rotation. It is the modern successor to Greenwich Mean Time (GMT) and serves as the basis for all global time zones.
Dialectal Variation
British vs American Usage
Differences
No significant differences in usage or understanding. The abbreviation 'UTC' is standard worldwide.
Connotations
In the UK, UTC is often conflated with or referenced as 'GMT' in public discourse, due to historical association. In the US, 'UTC' is more likely to be used as the primary technical term without direct reference to GMT.
Frequency
Technical use is identical in frequency. Non-technical use in the UK may slightly more often reference 'GMT' where 'UTC' would be technically correct.
Grammar
How to Use “coordinated universal time” in a Sentence
[Event] is scheduled for [time] UTC[System] runs on UTCConvert [local time] to UTC[Timezone] is [number] hours ahead of/behind UTCVocabulary
Collocations
Examples
Examples of “coordinated universal time” in a Sentence
verb
British English
- The server logs must be **coordinated to** Universal Time for the audit.
American English
- The network administrator will **coordinate** all timestamps to Universal Time.
Usage
Meaning in Context
Business
Used for scheduling international conference calls, financial transaction timestamps, and coordinating global supply chains.
Academic
Used in scientific papers, astronomy, physics experiments, and any research requiring precise, unambiguous time references.
Everyday
Used when booking international travel, understanding online event times (e.g., game launches, live streams), and setting computer clocks.
Technical
The fundamental reference for computing systems, network protocols (e.g., NTP), aviation, maritime navigation, and space operations.
Vocabulary
Synonyms of “coordinated universal time”
Strong
Neutral
Weak
Vocabulary
Antonyms of “coordinated universal time”
Watch out
Common Mistakes When Using “coordinated universal time”
- Pronouncing 'UTC' as individual letters 'U-T-C' (common) vs. the occasional but less common 'ut-see'.
- Writing 'UTC' in lowercase ('utc'). It is standard to write it in uppercase.
- Using 'GMT' and 'UTC' as absolute synonyms. While often the same in casual terms, GMT is now a time zone, not the atomic time standard.
FAQ
Frequently Asked Questions
No. GMT is a time zone based on the Earth's rotation. UTC is a more precise, atomic time standard. For most everyday purposes, they can be considered equivalent (UTC+0), but scientifically and technically, UTC is the correct standard.
You need to know your time zone's offset from UTC. For example, Eastern Standard Time (EST) is UTC-5. If it's 10:00 EST, then it is 15:00 UTC (10 + 5). Many online tools and world clock apps do this automatically.
It was a compromise. English speakers proposed 'CUT' (Coordinated Universal Time) and French speakers proposed 'TUC' (Temps Universel Coordonné). The neutral abbreviation 'UTC' was chosen to satisfy both language groups.
In military and aviation contexts, 'Z' stands for 'Zulu Time', which is another name for UTC. It comes from the NATO phonetic alphabet, where 'Z' is 'Zulu', representing the zero UTC offset (Zulu time zone).
The primary global time standard by which the world regulates clocks and time, based on atomic timekeeping.
Coordinated universal time is usually technical, formal, official in register.
Coordinated universal time: in British English it is pronounced /kəʊˌɔːdɪneɪtɪd ˌjuːnɪvɜːsəl ˈtaɪm/, and in American English it is pronounced /koʊˈɔːrdəneɪt̬ɪd ˌjuːnɪvɜːrsəl ˈtaɪm/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “on Zulu time”
- “set your watch to UTC”
- “speaking in UTC”
Learning
Memory Aids
Mnemonic
Imagine the world as a giant, perfectly COORDINATED clock, set to ONE UNIVERSAL TIME, so everyone can sync up.
Conceptual Metaphor
TIME IS A UNIVERSAL GRID; UTC is the zero point or prime meridian of this grid, providing a fixed reference frame for all locations.
Practice
Quiz
What is the primary purpose of Coordinated Universal Time?