Hi Phillip,
--On January 3, 2017 at 12:42:42 PM -0500 Phillip Hallam-Baker
<phill(_at_)hallambaker(_dot_)com> wrote:
1) TAI: Use this and only this for any and all purposes that involve
recording the time an event took place. Including forensic and scientific
purposes.
2) PIT: Use this for inter-machine communications. It may also be used to
present TAI in a human readable form because the mapping from TAI to PIT
is fixed.
3) Local Time Zones: For human display purposes
Please note that local time is needed not just for human display purposes
but also for handling recurring events that are "anchored" to a local time.
e.g., you want your thermostat to turn on at 6pm local time every day, but
that has to account for daylight saving time changes etc. Thus when
defining future data/time values, often (local time & time zone id) is
required and must be part of the data interchange between devices. Thus the
need to keep devices up to date with time zone changes (which was the
primary impetus for the tzdist RFC7808 work).
--
Cyrus Daboo