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Build a pinned copy of tzdata for use with CI#1470

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pganssle wants to merge 3 commits intodateutil:masterfrom
pganssle:tzdata_pin
Open

Build a pinned copy of tzdata for use with CI#1470
pganssle wants to merge 3 commits intodateutil:masterfrom
pganssle:tzdata_pin

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@pganssle pganssle commented Mar 3, 2026

Summary of changes

This allows us to pin to a specific version rather than relying on whatever is on the system version.

This is implemented as a single (cached) job to build the TZif files which are then used by anything that needs them.

Pull Request Checklist

pganssle added 3 commits March 3, 2026 00:09
This bypasses SSL validation, which can be a sticking point with old
python versions, and the risk here seems very low.
This uses a single job to build the zoneinfo directory for a pinned
TZDATA version (cached), which can then be reused in all other jobs.
@pganssle pganssle added this to the Master milestone Mar 3, 2026
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