Hi Paul, El lun, 3 nov 2025 a las 19:23, Paul Gilmartin via tz (<tz@iana.org>) escribió:
On 11/2/25 03:11, Guillermo Rodriguez Garcia via tz wrote:
...
So, the question: Any suggestions on how to filter timezones within each country to drop those that as of today are not relevant except for historical differences? ...
The last line of each timezone definition appears to contain the current POSIX definition. (I don't know where this is documented.) If those lines are identical, might zones be merged?
Yes. Although my question was not really "what zones can be merged" (I already solved that -- I can already identify zones which have identical rules for "present and future times"). The real question was: whenever I find two zones that can be merged, which one wins? For example, in the case I mentioned in my original email (Spain), Ceuta should be discarded and Madrid should be kept. Thanks, Guillermo Rodriguez Garcia guille.rodriguez@gmail.com