[tz] Official definition and origin of the term "Central European Time"
eggert at cs.ucla.edu
Sat Oct 24 04:50:31 UTC 2015
On 10/23/2015 01:52 PM, Even Scharning wrote:
> All credible sources I have found, say that CET is a constant UTC+1.
Many sources also use "Central European Time" to denote either UTC+1 or
UTC+2, depending on whether daylight saving time is in use. For example,
"Most of the cities in this book are on Central European Time, which is
1hr. ahead of Greenwich Mean Time (GMT) and observes Daylight Saving
Time during the summer." -- Let's Go Europe 2012.
North American practice is to use phrases like "Pacific Time" when one
wants the time zone independently of whether DST is in use, and phrases
like "Pacific Standard Time" and "Pacific Daylight Time" when one wants
to specify whether DST is in use. There's no similar convention for
European time zones, so phrases like "Central European Time" are
ambiguous in practice, and careful writers should specify which meaning
is intended -- as is done in the abovementioned quote from "Let's Go
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