On 2023-11-06 15:47, Doug Ewell via tz wrote:
Guy Harris wrote:
2. Starting at midnight on the first Saturday of the month of September 2023 and until midnight on the first Saturday of the month of April 2024, the official time will be advanced by 60 minutes.
Presumably meaning "Starting at midnight at the end of the first Saturday of the month of September 2023", as the last Rule entry for Chile is
Rule Chile 2023 max - Sep Sun>=2 4:00u 1:00 -
Correct and understood; the decree’s “midnight on [viz. at the end of] Saturday” (here, the 2nd) is equivalent to my “midnight at the start of Sunday” (here, the 3rd). But it could not refer in any way to the 11th. The rules use Sun >= 2 becuse the time specified with "u" is UTC not local, it is the same as Sun >= 1 (1st Sunday) in local time; and Sun >= 9 Z => Sun >= 8 local (2nd Sunday) in 2022 only.
So Sun 3 & 10 would be "4" & "11" for these rules. I think the OP has generalized from a single data point, and may think the 2022 change on 2nd Sunday was meant to continue, but that was reverted for 2023 on: Rule Chile 2019 max - Apr Sun>=2 3:00u 0 - Rule Chile 2019 2021 - Sep Sun>=2 4:00u 1:00 - Rule Chile 2022 only - Sep Sun>=9 4:00u 1:00 - Rule Chile 2023 max - Sep Sun>=2 4:00u 1:00 - See https://github.com/eggert/tz/blob/main/southamerica#L1318 for Chile's DST history -- Take care. Thanks, Brian Inglis Calgary, Alberta, Canada La perfection est atteinte Perfection is achieved non pas lorsqu'il n'y a plus rien à ajouter not when there is no more to add mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut -- Antoine de Saint-Exupéry