massucattoj opened a new pull request, #37064: URL: https://github.com/apache/superset/pull/37064
<!--- Please write the PR title following the conventions at https://www.conventionalcommits.org/en/v1.0.0/ Example: fix(dashboard): load charts correctly --> ### SUMMARY ### SUMMARY Fixes the Calendar Heatmap chart displaying the previous month when the selected date range starts mid-week in timezones behind UTC. **Root Cause**: The backend sends UTC timestamps (correct), but the `cal-heatmap` vendor library interprets them as local time. For example, January 1, 2024 00:00 UTC becomes December 31, 2023 in PST (UTC-8), causing the chart to display December instead of January. **Solution**: Created `convertUTCTimestampToLocal()` utility that adjusts the timestamp by adding the timezone offset before passing to `cal-heatmap`. This ensures the library displays the correct month regardless of user's timezone. ### BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF <img width="1440" height="767" alt="image" src="https://github.com/user-attachments/assets/231379f6-4785-47f6-8d62-a5c7052571d7"; /> <img width="902" height="792" alt="Screenshot 2026-01-12 at 17 45 41" src="https://github.com/user-attachments/assets/b29f87ba-bbbc-4341-bdb4-9b5390824649"; /> ### TESTING INSTRUCTIONS <!--- Required! What steps can be taken to manually verify the changes? --> ### ADDITIONAL INFORMATION <!--- Check any relevant boxes with "x" --> <!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue --> - [ ] Has associated issue: - [ ] 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]
