emecii opened a new issue, #51271: URL: https://github.com/apache/arrow/issues/51271
### Describe the bug, including details regarding any error messages, version, and platform. `ArrowFormat::Date32Array` encodes Ruby `Date` values with `Date#day`, which is the day of the month. Arrow Date32 values must be the number of days since the Unix epoch. This also affects `ArrowFormat::Array.build`, which infers `Date32Array` for `Date` values. On current `main` (`df40dd400`): ```ruby require "date" require "arrow-format" value = Date.new(2026, 7, 17) array = ArrowFormat::Array.build([value]) p array.to_a # Actual: [17] # Expected: [20651] ``` The existing ArrayBuilder date test compares against another `Date32Array` built from the same `Date`, so both sides pass through the same incorrect conversion and the regression is not detected. ### Component(s) Ruby -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
