On 2022-03-16 11:44 AM, Fred Gleason via tz wrote:
On Mar 16, 2022, at 11:16, Tim Parenti via tz <tz@iana.org <mailto:tz@iana.org>> wrote:
Complicating matters somewhat is that, because of the prevalence of tzdb, in a sense we're "victims of our own success". That is, whatever we end up picking will likely show up fairly automatically in a lot of public-facing places, and so even if it isn't what the public would've naturally used in the immediate aftermath of a change, many will be fairly quickly informed by what they start to see, and may start adopting and spreading whatever nomenclature we've picked.
With that in mind, I’m thinking that the best approach might be (to take a page from the Hippocratic Oath) to “do no harm”. Given that the overall thrust of the Bill is ‘permanent DST’, perhaps we should reflect just that —i.e. the “permanent” abbreviations would become EDT | CDT | MDT | PDT, the 'tm_isdst' member of the 'tm' struct would always return a positive value, etc. This is what happened in America/New_York in 1942, except the abbreviations were EWT and EPT, right?
Rule US 1918 1919 - Oct lastSun 2:00 0 S Rule US 1942 only - Feb 9 2:00 1:00 W # War Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace Rule US 1945 only - Sep 30 2:00 0 S -880218001 1942-02-09 01:59:59 EST isdst 0 gmtoff -18000 stdoff -18000 -880218000 1942-02-09 03:00:00 EWT isdst 1 gmtoff -14400 stdoff -18000 -769395601 1945-08-14 18:59:59 EWT isdst 1 gmtoff -14400 stdoff -18000 -769395600 1945-08-14 19:00:00 EPT isdst 1 gmtoff -14400 stdoff -18000 -765396001 1945-09-30 01:59:59 EPT isdst 1 gmtoff -14400 stdoff -18000 -765396000 1945-09-30 01:00:00 EST isdst 0 gmtoff -18000 stdoff -18000 -Brooks
Doing this would narrowly confine the scope of the changes to DST transition handling itself; without the need to go change the meanings of abbreviations as defined in the relevant RFCs and other standards with the concomitant needed changes in downstream applications.
Cheers!
|---------------------------------------------------------------------| | Frederick F. Gleason, Jr. | Chief Developer | | | Paravel Systems | |---------------------------------------------------------------------| | A room without books is like a body without a soul. | | | | -- Cicero | |---------------------------------------------------------------------|