[tz] A simple solution to have zones merge into another zone

[Stephen Colebourne]

On Mon, 14 Jun 2021 at 08:27, Paul Eggert via tz <tz at iana.org> wrote:
> Any changes along these lines would be complicated by
> backward-compatibility concerns, though. That is, we could use a
> "follow"-like syntax only in vanguard format at first.

There is a difference with negative DST though. In my experience,
negative DST is impossible to revert in the general case, as a result
people want to avoid it. By contrast, a follow rule could be easily
implemented as no data is being lost.
Stephen