FW: FW: Corrections to historic German timezone information
eggert at CS.UCLA.EDU
Fri Feb 8 20:14:02 UTC 2008
"Markus Scherer" <markus.icu at gmail.com> writes:
> All of France, and Paris, was occupied. It makes sense to apply the
> occupier's rules that were in effect there during the occupation.
Our sources report that Vichy France used different DST rules than
German-occupied France did. The "France" rules are for Vichy France.
Europe/Paris uses the occupied-Europe rules; Europe/Monaco (not part
of Vichy, but reportedly used Vichy rules) uses the French rules.
> In Berlin there were multiple occupiers. The eastern sector  was
> smaller and less populous than the three western ones together .
The tz database uses a single latitude/longitude coordinate to
identify a city by its center; the current format does not have the
capability to represent the entire city outline. So the question,
from the tz point of view, is: what is the center of Berlin? If it's
in east Berlin the tz database uses the rules appropriate for that
location. Currently the database simply accepts Shank & Pottenger's
definition for the center of Berlin (as being in east Germany) but if
that's incorrect then we can fix it.
> Should the TZ rules not reflect the transitions in the larger part of
> the territory, for historical data where the TZ database won't split
> the time zone to describe each of the parts?
Not the way it's currently constructed. It currently specifies one
location for each zone, and gives accurate data for that location.
More information about the tz