[tz] So, about those LMT offsets

Steve Allen sla at ucolick.org
Sun May 23 03:38:48 UTC 2021


On Sun 2021-05-23T10:54:16+0800 Philip Paeps via tz hath writ:
> This is a good point.  Particularly since LMT is only "correct" for very
> narrow regions within any given timezone.

In general LMT is not even correct for the city at the given location.

Prior to 1834 the Nautical Almanac tabulated Greenwich Apparent Time,
not Greenwich Mean Time.

In the US insurers during the 19th century wrote policies which
specified the expiration at noon on a particular date because it was
reasonably likely that witnesses could testify as to whether the fire
started while the sun was on the east side of buildings or the west
side of buildings.  For the purposes of the insurance legal time was
local apparent solar time, not local mean solar time.

--
Steve Allen                    <sla at ucolick.org>              WGS-84 (GPS)
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