codeant-ai-for-open-source[bot] commented on PR #34564:
URL: https://github.com/apache/superset/pull/34564#issuecomment-3893762940
## **Sequence Diagram**
Shows the corrected flow where UTC timestamps from the backend are formatted
directly (no local timezone subtraction) so calendar cells display the original
UTC date without a one-day offset.
```mermaid
sequenceDiagram
participant Backend
participant CalHeatmap as "Cal-Heatmap (frontend)"
participant Util as "getFormattedUTCTime"
participant UI as "Calendar Heatmap UI"
Backend->>CalHeatmap: Send timestamps (UTC)
CalHeatmap->>Util: Format timestamp for display (pass-through, no offset)
Util-->>CalHeatmap: Formatted date string (UTC date preserved)
CalHeatmap->>UI: Render calendar cell with formatted date
```
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