New submission from Robert Billing <robertthebill...@googlemail.com>:

https://docs.python.org/3.7/library/time.html contains the text "UTC is 
Coordinated Universal Time (formerly known as Greenwich Mean Time, or GMT)". 
This is not strictly true. Referring to 
https://en.wikipedia.org/wiki/Coordinated_Universal_Time the definition of UTC 
is in terms of frequency standards, GMT in terms of astronomy. Hence with GMT 
each minute has exactly 60 seconds, but the length of the second may vary 
slightly to account for changes in the Earth's rotation. With UTC each second 
is the same length, but "leap seconds" can be inserted or removed giving 59 and 
61 second minutes. The leap seconds keep the two systems in sync to less than 
one second.

This of course only matters for the most critical applications, but it would be 
worth documenting correctly.

----------
assignee: docs@python
components: Documentation
messages: 337482
nosy: Robert Billing, docs@python
priority: normal
severity: normal
status: open
title: Definitions of time
type: enhancement
versions: Python 3.7

_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue36240>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe: 
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com

Reply via email to