[tz] Extra transition for Europe/London with 2023d

[Stephen Colebourne]

On Sat, 6 Jan 2024 at 23:00, Guy Harris <gharris at sonic.net> wrote:
> what was the rationale for exposing them both?  Was there a situation where a Java library or application needed that information?

So people can use them?
https://stackoverflow.com/questions/1060479/determine-whether-daylight-savings-time-dst-is-active-in-java-for-a-specified

> >> So what do the (presumed) Booleans "dstLegal" and "dstSummer" mean here?
> >
> > They allow the JSON file to express the difference between negative
> > DST and "are the clocks > standard offset" DST.
>
> Was this done before, or after, the "Ireland does things differently" issue popped up?

isDaylightSavings() returns true in summer for Dublin in Java - always has done.

Stephen