[tz] changes to the TZ database over versions

[Ángel González]

On 01/06/14 17:51, Joris Van den Bogaert wrote:
> Hi Paul,
>
> Oops, I forgot to compile and include "backward" as well.  Many thanks.
>
> Looking at the git log, it looks like most changes are typos and
> adjustments to data far away in the past, like the early 1900's or
> Big Bang :) changes and sometimes the very near future, like Egypt and 
> Turkey.
> I didn't find any substantial changes that were made in the near past.
That's because the near past is generally well-known and thus 100% 
accurate :)

> Hypothetically, let's say Catalonia becomes a separate state on 
> 1/1/2015 and decides
> to have a timezone UTC+01:30 instead of CET.  Do you guys then decide 
> to create a
> new timezone Europe/Barcelona?
Yes.

> What (should) happens when converting
> the datetime 1/1/2014 with "Europe/Barcelona", a timezone that didn't 
> exist at that time?
It will provide the same values as if computed with Europe/Madrid.

Don't think on it as “the timezone didn't exist” but “using the same 
time rules as Barcelona
at that time”.


> Sorry for the trivial questions, I'm new to this field.
>
> Cheers,
> Joris
You're welcome :)