[tz] CST timezone that does not account for DST

[random832 at fastmail.us]

On Thu, Jul 30, 2015, at 14:21, Brian Inglis wrote:
> In Canada, areas that do not change their GMT offset do change their time
> legally at the same time as the rest of North America, from CST to MDT or
> MST to PDT, etc. i.e. they observe the daylight saving time of the zone
> to
> the west. ;^>

Do you have a citation for this? It certainly doesn't seem to actually
be true of the current implementation in tzdata.

I live in Indiana and people (before DST was adopted) would often _talk_
about being on central time or "chicago time" for half the year, but it
wasn't actually true in any official sense.