[tz] Proposal for new rules

Lester Caine lester at lsces.co.uk
Thu Aug 29 20:44:34 UTC 2013

Zefram wrote:
> In the above, I'm using the term "country" as a synonym for "ISO 3166
> region", by which I mean a region to which ISO 3166 assigns a regular
> alpha-2 code.  I think this is uncontroversial ground on this list,
> but worth explicating in this context: the biggest political question
> we're ducking is what constitutes a country.

Looking at the genealogical data, country boundaries change over time, so we can 
not rely on the current map of the world if the job is to be done correctly. No 
doubt in the future some areas will move from one time zone to another due to 
'political' changes. Being practical, clocks were not being used widely before 
the 1700s, but prior to that time was actually quite 'accurate' based on the 
sundial, so much so that clocks set to local time then demonstrated the error 
across countries. 'Midday' in historic records can be reliably determined for 
any where on the world on any date but I think for now simply aiming to reflect 
the creation of time zones back in 1884 should be a starting point?

Lester Caine - G8HFL
Contact - http://lsces.co.uk/wiki/?page=contact
L.S.Caine Electronic Services - http://lsces.co.uk
EnquirySolve - http://enquirysolve.com/
Model Engineers Digital Workshop - http://medw.co.uk
Rainbow Digital Media - http://rainbowdigitalmedia.co.uk

More information about the tz mailing list