[tz] Adding verified historic details

Ángel González keisial at gmail.com
Wed Sep 4 22:20:04 UTC 2013

On 04/09/13 23:15, Lester Caine wrote:
> Paul Eggert wrote:
>> On 09/04/13 13:43, Lester Caine wrote:
>>> >Is that good enough to merge?
>> I'm afraid we can't add zones that differ only in pre-1970
>> dates until we can figure out how to filter them out in
>> the default case, as we aren't prepared for the
>> hundreds or thousands of new zones that would be feasible
>> if we opened the floodgates.  Zefram has one prototype for
>> filtering, which I really must get to at some point.
> Paul - this is the point of contention !
> Deleting any data is wrong. If users have a reason for only viewing 
> part of the data then fair enough, but we have the opportunity here to 
> get this right before it becomes embedded in every browser. That does 
> not want a broken set of timezones with this arbitrary cutoff - THAT 
> is the very thing some of us want to get away from.
I don't know why a browser would want to embed its own copy of tz, but 
this seems the wrong example. Actually, I think browsers should not 
expose the full tz rules, as that would allow to pinpoint the user quite 
accurately by probing old timezones that aren't actually needed by web apps.

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