Re: [POLL] Proposed syntax for timestamps with time zone info (was: [FEATURE REQUEST] Timezone support in org-mode datestamps and org-agenda)

[Ihor Radchenko]

Christian Moe <mail@christianmoe.com> writes:

> From this perspective I'd be happier with the less concise, but super
> explicit
>
>   2022-11-12 14:00 UTC+2
>   2022-11-12 14:00 UTC-2:30

[2022-11-12 14:00 @UTC+2]
[2022-11-12 14:00 @UTC-2:30]

are also fine within the proposed format.

Note, however, that because we are conforming to POSIX TZ, @UTC+2 is two
hours _behind_ the Greenwich.

https://www.di-mgt.com.au/wclock/help/wclo_tzexplain.html:

    Explanation of TZ strings

    General format of an entry in the file wclocktz.ini:
    [continent/city]
    TZ=posix-tz-string

    Time zones that do not have daylight savings have a simple TZ string,
    e.g.

    [Pacific/Honolulu]
    TZ=HST10

    Where HST is the designation for the time zone (in this case Hawaii
    Standard Time) and 10 is the offset in hours. The offset indicates the
    value one must add to the local time to arrive at Coordinated
    Universal Time (UTC, aka GMT), and so it is positive for west of the
    meridian, e.g. America, and negative for east, e.g. China.

    [Asia/Beijing]
    TZ=CST-8

    Minutes and seconds are optional, so CST-8 and CST-08:00:00 mean the
    same thing. Note that the sign convention (+/-) used in a Posix TZ
    string is the opposite to that used in Internet time offsets (RFC
    3339) and in Arthur David Olson's TZ data files.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>