Aloha Ihor,

Ihor Radchenko <yanta...@posteo.net> writes:

"Thomas S. Dye" <tsd@tsdye.online> writes:

I understand above that it is easier understandable when reading [2023-01-22 Sun 08:29@+1100] as it is assumed by poster (I guess Max)
that user will understand that there is +11 hours ahead.

Yes, the offset here is ambiguous--is it offset from some timezone or from UTC?

It is not ambiguous if the user is familiar with standard time format.
The representation above is derived from
https://en.wikipedia.org/wiki/ISO_8601, which allows the following:

    <time>Z

If the time is in UTC, add a Z directly after the time without a space. Z is the zone designator for the zero UTC offset. "09:30 UTC" is therefore represented as "09:30Z" or "T0930Z". "14:45:15 UTC" would be
    "14:45:15Z" or "T144515Z".

    <time>±hh:mm
    <time>±hhmm
    <time>±hh

The UTC offset is appended to the time in the same way that 'Z' was
    above, in the form ±[hh]:[mm], ±[hh][mm], or ±[hh].

Negative UTC offsets describe a time zone west of UTC±00:00, where the civil time is behind (or earlier) than UTC so the zone designator will
    look like "−03:00","−0300", or "−03".
Positive UTC offsets describe a time zone at or east of UTC±00:00, where the civil time is the same as or ahead (or later) than UTC so the zone
    designator will look like "+02:00","+0200", or "+02".


Got it. Thanks for the full explanation! The ambiguity I mentioned was due to my ignorance of the time standard format variants.

Here is a proposal for a terminology of events that honors Ramsey's distinction between events and occurrences and hopes to cover all of Org's use cases.
...
...
The Org user should be able to toggle timestamp representation. In the case of a no-host event, user might toggle between UTC and local time. In the case of situated or itinerant event, user might toggle among UTC, local time, and local time at the event site.

Instead of toggling, would it be better to echo the different formats
like eldoc does + mouse-echo?

Or both?  Toggling globally and echoing individually, IIUC?

All the best,
Tom

--
Thomas S. Dye
https://tsdye.online/tsdye

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