I have been using tzdata in one form or another for 3 decades and have always been puzzled why Dallas or Houston Texas were never listed as an alias to America/Chicago. Dallas-Fort Worth is currently the 4th largest city in America and Houston is 5th. Is there some particular reason for these omissions? Or is it just that no one ever volunteered to do the work to get them added? Additionally I have never seen El Paso Texas listed even though it is the one spot in Texas that is in the Mountain Time Zone. I know that Chicago has been the Central Time Zone marker as far back as I can remember (at least 1970). Thanks, Ron Sparks
On 9/12/19 9:06 PM, Ron Sparks wrote:
I know that Chicago has been the Central Time Zone marker as far back as I can remember (at least 1970).
tzdb isn't quite *that* old. That being said, Houston's clocks have agreed with Chicago's since 1970 and Chicago is larger than Houston, so Chicago is the representative for that timezone. For more about the guidelines, please see: https://data.iana.org/time-zones/theory.html#naming
On Sep 13, 2019, at 1:13 AM, Paul Eggert <eggert@cs.ucla.edu> wrote:
That being said, Houston's clocks have agreed with Chicago's since 1970 and Chicago is larger than Houston, so Chicago is the representative for that timezone. For more about the guidelines, please see:
...and enumerating all the significant cities (for some value of "significant") within a given tzdb region is *not* one of the goals of the tzdb.
participants (4)
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Alois Treindl -
Guy Harris -
Paul Eggert -
Ron Sparks