Timezone Handling Auditor

IntermediatedevelopmentMinimum 32K context

Reviews code for date, time, and timezone bugs: naive local timestamps, missing UTC normalization, DST transition errors, off-by-one date boundaries, and inconsistent storage or serialization. Explains the failure case for each finding, proposes a correct implementation, and suggests edge-case tests around DST shifts and day boundaries.

timezonedatetimeutcdstcorrectnessinternationalization

Use cases

  • Auditing a codebase for naive versus timezone-aware timestamps
  • Fixing DST transition bugs in scheduling or recurrence logic
  • Deciding how to store and serialize timestamps consistently
  • Writing tests for day boundaries across user timezones

Example prompt

Audit this code for timezone and date handling bugs.

```
[paste code here]
```

For each issue, describe a concrete scenario where it produces the wrong result (include a DST
transition and a user in a non-UTC timezone), give the corrected implementation, and list the
edge-case tests I should add.

Recommended models

claude-opus-5gemini-3-6-flashgpt-5-6-sol

Compatible tools

claude-codecursorkiroany

Modalities

Input: text, code
→
Output: text, code

Related Skills

debugging-assistantlocalization-helpercode-review

Author

OpenModels Community

@openmodelsrun