Soren Stoutner <[email protected]> writes: > Can you think of any way that using the Etc/GMT+12 and Etc/GMT-14 syntax > would cause any *problems*?
Yes: Etc/GMT+12 and Etc/GMT-14 generate different time zone abbreviations. % env TZ=Etc/GMT+12 date Thu Oct 2 05:31:10 AM -12 2025 % env TZ=Etc/GMT-14 date Fri Oct 3 07:31:14 AM +14 2025 The point of using GMT+12 and GMT-12 is that they keep the same (incorrect, but it doesn't really matter for this purpose) time zone abbreviation for reproducibility testing: % env TZ=GMT+12 date Thu Oct 2 05:32:09 AM GMT 2025 % env TZ=GMT-12 date Fri Oct 3 05:32:12 AM GMT 2025 Otherwise, you may get spurious reproducibility failures due to the changed time zone abbreviation. I don't believe there is a mechanism to force the same time zone abbreviation other than usig POSIX rule-based zones. -- Russ Allbery ([email protected]) <https://www.eyrie.org/~eagle/>
