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gh-159712: Fix zero-based day rules in zoneinfo - #159723

Draft

pganssle wants to merge 5 commits into

python:mainfrom

pganssle:fix-zoneinfo-159712

Draft

gh-159712: Fix zero-based day rules in zoneinfo#159723
pganssle wants to merge 5 commits into
python:mainfrom
pganssle:fix-zoneinfo-159712

Commits on Oct 19, 2026
- gh-159715: Fix ZoneInfo TZ rules spanning year boundaries
  pganssle
  committed
  191fbd7
- gh-159715: Explain year-boundary cases and lookup margins
  pganssle
  committed
  bd5ef4d
- gh-159715: Explain lookup margins where they are used
  pganssle
  committed
  1bcb2eb
- gh-159715: Cite the specification for transition hour limits
  pganssle
  committed
  b9374b4
- gh-159712: Fix zero-based day rules in zoneinfo
  pganssle
  committed
  5b2ce22