tzercin opened a new pull request, #37979: URL: https://github.com/apache/superset/pull/37979
### SUMMARY Fixes an epoch-shift bug in Explore Results when switching “Formatted date” ↔ “Original value” by correcting timezone-aware datetime → epoch conversion to preserve the absolute instant. Convert tz-aware datetimes to UTC using astimezone(pytz.utc) instead of re-labeling tzinfo with replace(tzinfo=UTC). Add a regression unit test covering tz-aware datetime serialization to epoch. replace(tzinfo=UTC) changes the represented instant for tz-aware datetimes, causing offsets like +8 hours in the serialized epoch; astimezone(UTC) performs a true conversion and keeps the instant consistent. ### BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF Before: <img width="1919" height="976" alt="Screenshot 2026-02-15 at 00 21 58" src="https://github.com/user-attachments/assets/48f5a0ff-33fb-4feb-ac30-9bcc5a29ee07"; /> <img width="1920" height="980" alt="Screenshot 2026-02-15 at 00 22 06" src="https://github.com/user-attachments/assets/092a043c-6dcc-4b4a-bb3e-a78ce31162fa"; /> After: <img width="1920" height="1040" alt="Screenshot 2026-02-15 at 00 21 09" src="https://github.com/user-attachments/assets/ab3e353e-9bf6-4519-911b-08a315f88794"; /> <img width="1920" height="976" alt="Screenshot 2026-02-15 at 00 21 31" src="https://github.com/user-attachments/assets/fbe7933f-0952-42a8-bc6f-d8fa14031d3c"; /> ### TESTING INSTRUCTIONS - Create a local postgres db instance on docker with a certain timezone other than UTC. `docker run -d --name postgres -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=postgres -e TZ=Asia/Shanghai -p 5432:5432 postgres:latest` - Create an example dataset on this DB which looks like this: <img width="1515" height="656" alt="Screenshot 2026-02-15 at 00 26 58" src="https://github.com/user-attachments/assets/59e86e88-0f38-4a84-beb6-aba1d6a3bc5f"; /> - Explore the dataset as explained in the issue. - Also you can run this test: `python -m pytest tests/unit_tests/utils/json_tests.py::test_json_int_dttm_ser` ### ADDITIONAL INFORMATION - [x] Has associated issue: Fixes #37947. - [ ] Required feature flags: - [ ] Changes UI - [ ] Includes DB Migration (follow approval process in [SIP-59](https://github.com/apache/superset/issues/13351)) - [ ] Migration is atomic, supports rollback & is backwards-compatible - [ ] Confirm DB migration upgrade and downgrade tested - [ ] Runtime estimates and downtime expectations provided - [ ] Introduces new feature or API - [ ] Removes existing feature or API -- 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] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
