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gh-80421: Correct definitions of time #130984

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Mar 9, 2025
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10 changes: 7 additions & 3 deletions Doc/library/time.rst
Original file line number Diff line number Diff line change
Expand Up @@ -52,9 +52,13 @@ An explanation of some terminology and conventions is in order.
single: Coordinated Universal Time
single: Greenwich Mean Time

* UTC is Coordinated Universal Time (formerly known as Greenwich Mean Time, or
GMT). The acronym UTC is not a mistake but a compromise between English and
French.
* UTC is `Coordinated Universal Time`_ and superseded `Greenwich Mean Time`_ or
GMT as the basis of international timekeeping. The acronym UTC is not a
mistake but conforms to an earlier, language-agnostic naming scheme for time
standards such as UT0, UT1, and UT2.

.. _Coordinated Universal Time: https://en.wikipedia.org/wiki/Coordinated_Universal_Time
.. _Greenwich Mean Time: https://en.wikipedia.org/wiki/Greenwich_Mean_Time

.. index:: single: Daylight Saving Time

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