Re: [FEATURE REQUEST] Timezone support in org-mode datestamps and org-agenda

[Max Nikulin]

On 17/01/2023 01:37, Ihor Radchenko wrote:
> > Some formats may be confusing for users, e.g. TZ=GMT+5 actually means
> > -0500 offset.
> Let's just recommend +-XXXX and @location in the manual. And mention
> briefly that TZ format is supported in addition.
>
> We might also provide an optional linter for GMT, if necessary.

"GMT" in this example is an arbitrary string. It adds some complications 
to the linter.

Notice that in POSIX "GMT+5" is *definition* of timezone with "GMT" 
abbreviation and shifted by 5 hours to the west. It is not a *reference* 
to IANA (Olson) Etc/GMT+5. I do not remember concerning "GMT", but Qt 
allows to use something like "UTC+5" (east like IANA, not west like 
POSIX). I am unsure concerning Windows, it may have an option of quite 
similar variant. That is why I am not sure to which degree Org should be 
liberal in respect to various time zones.