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BUG: read_json(orient="table") raising for tz-naive datetime fields with offsets (GH#52595) - #71322
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October 19, 2026 21:50
…ith offsets (GH#52595) pandas<1.5 wrote tz-naive datetimes with a "Z" suffix, so table-orient JSON from those versions failed to read since 2.0. Parse such fields as UTC and drop the tz, matching 1.5.3. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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closes #52595
pandas<1.5 wrote tz-naive datetimes with a
Zsuffix (fixed in GH-38760), soorient="table"JSON from those versions has a{"type": "datetime"}field with no"tz"whose values carry an offset. Since 2.0 theastype("datetime64[ns]")inparse_table_schemarefuses these andread_jsonraises. Such fields are now cast to UTC and the tz dropped, giving the tz-naive UTC wall time as 1.5.3 did. Values without an offset are unaffected, and parsing still goes through the sameastype, so non-ISO strings and error messages are unchanged.AI disclosure: drafted with Claude Code (
claude opus 5.5 (high)), used to diagnose the regression, write the fix and test, and review the branch.