On 2014-02-17 03:35 AM, Tony Finch wrote:
Clive D.W. Feather <cl...@davros.org> wrote:
Brooks Harris said:
Wikipedia (not always an authoritative source)
Standard time
http://en.wikipedia.org/wiki/Standard_time
states:
"Where daylight saving time is used, the term standard time typically
refers to the time without the offset for daylight saving time.".
That is consistent with my understanding of "Standard time".
But not mine.
"standard time" is to be contrasted with "local time". Both GMT and BST are
"standard time" in the UK.
That isn't the contrast in ISO 8601. It says:
2.1.16 local time
locally applicable time of day such as standard time of day, or a
non-UTC based time of day
The relevant distinction is from the late 1800s, between local mean solar
time and time based on a standard meridian, as in railway time. So ISO
8601 is right that summer time is also a standard time (in this sense)
even though the North American terminology that distinguishes between
(original) standard time and daylight saving time is clearer.
Tony.
The WORLD MAP OF TIME ZONES published by the UK Hydrographic Office uses
the "standard plus daylight" convention.
STANDARD TIME ZONES
Corrected to April 2012
Zone boundaries are approximate
Daylight Saving Time (Summer Time),
usually one hour in advance of Standard
Time, is kept in some places
Map outline © Mountain High Maps
Compiled by HM Nautical Almanac Office
http://www.ukho.gov.uk/HMNAO/HMNAODocs/Wmtz120424.pdf
-Brooks
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