[tz] Adding verified historic details

Lester Caine lester at lsces.co.uk
Wed Sep 4 22:41:38 UTC 2013

Russ Allbery wrote:
>> Where different locations adopt standard time at different documented
>> >times then the source file format needs to be change to accommodate
>> >that. I proposed that the location and date is recorded and then links
>> >to the following timezone for the rest of the data. The Isle of man is a
>> >perfect example of this since all it differs in is the date of the start
>> >of using GMT.
> This sounds like a good idea to me, although I don't know what
> difficulties it poses for the rest of the software.  It would indeed be
> nice to not have to duplicate all the rules into a separate zone when the
> zones are identical after a certain date, and it also seems like it would
> make some possible winnowing strategies more straightforward.

Fix the current holes in the system so that we can handle all the missing data 
before writing software to take it way again?

Lester Caine - G8HFL
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