Re: POSIX TS spec reverses the meaning of TZ offset compared to ISO (was: [POLL] Proposed syntax for timestamps with time zone info

[Max Nikulin]

On 02/02/2023 04:57, Heinz Tuechler wrote:
> My impression is that many of non experts like me don't
> know in which time zone they are living.

For you own time zone: Open Development tools in a browser ([F12]), 
switch to console, type

     new Intl.DateTimeFormat().resolvedOptions().timeZone

I am sure there are a lot of web pages that do the same.

On linux you can use the following tool

    timedatectl

Unfortunately Emacs does not have API to obtain time zone identifier, 
only offset and abbreviation are exposed by GNU libc. POSIX does not 
have such requirement.

> Is it trivial to find the [continent/city] timezone name to a specific
> place?

For other places: since data to build time zone map are available, there 
should be web sites that allows to find identifier for any location. 
Sorry, I do not use them, so I can not recommend a particular one.

An application that is able to read locally installed tzdata may assist 
by filtering the list by time offset or by the continent (or the ocean, 
see e.g. Pacific/Apia trips across the International date line to 
America and back to Asia with Australia).