• Law Number 8,522 was promulgated on 1946-08-28, not the day before.
The text of the law specifies that it was *promulgated* (that is, made known) on Tuesday 1946-08-27, but it was *published* in 'Diario Oficial' the following day. But since Article 3 states that the law would come into force from the date of its publication, the conclusion is the same: The law came into force on Wednesday 1946-08-28.
• That law contains an "artícolo transitorio"
Good catch. This greatly simplifies the apparent corner cases which Paul had discussed in his 1 July message and gives a reasonably clear date for a single transition in central Chile, also 1946-08-28.
It would take further evidence (such as newspaper clips) in
order to ascertain the precise hour of the switch in both
cases. The proposed change implies switches at different
instants.
Although this is technically true as the two zones were off by an hour prior to this 1946-08-28 transition, it was a no-op for wall-clocks in Chile's northern and southern regions.
On Fri, 1 Jul 2022 at 14:13, Paul Eggert via tz <
tz@iana.org> wrote:
I expect it's better to set the DST flag
when the new law said DST started.
Lacking further specificity, let's presume the change came into effect in Santiago and central Chile at 24:00 -03. Similarly, let's change the DST bit for the rest of the mainland an hour later, when they reached 24:00 -04, as that's most consistent with Chile's general history of midnight transitions.
Proposed further patch attached and installed into the development repo.