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  1. Coordinated Universal Time ( UTC) is the primary time standard globally used to regulate clocks and time. It establishes a reference for the current time, forming the basis for civil time and time zones. UTC facilitates international communication, navigation, scientific research, and commerce.

    • Time zone

      Each time zone is defined by a standard offset from...

    • Universal Time

      Universal Time (UT or UT1) is a time standard based on...

  2. O Tempo Universal Coordenado (abreviado internacionalmente como UTC, um meio-termo entre o inglês Coordinated Universal Time e o francês Temps Universel Coordonné[ 1][ 2][ 3] ), também conhecido como tempo civil, é o fuso horário de referência a partir do qual se calculam todas as outras zonas horárias do mundo.

  3. Coordinated Universal Time (or UTC) is the standard time system of the world. It is the standard by which the world regulates clocks and time. It is, within about 1 second, mean solar time at 0° longitude. The standard before was Greenwich Mean Time (GMT). UTC and GMT are almost the same.

  4. Learn about UTC, the 24-hour time scale that synchronizes the world's clocks. Find out how UTC is based on atomic clocks and Earth's rotation, and how it differs from GMT and other time zones.