Plan to fix incorrect date calculation in Christmas countdown app:

• Research available time APIs that don't require authentication
• Modify Christmas app to fetch current date from internet
• Add fallback to local time if network fetch fails
• Test the date calculation logic
• Address code review feedback (HTTPS, resource cleanup, clearer constants)
• Run final code review
• Run security checks (no vulnerabilities found)
• Address PR review comments:
  • Fixed cache timing flaw: _last_fetch_attempt now updated only after successful fetch
  • Reduced timeout from 5s to 3s for better UI responsiveness
  • Added comprehensive date parsing validation with error handling
  • Clarified that _last_fetch_attempt IS used (line 82)

Summary

Fixed the Christmas countdown app showing incorrect days (358 instead of ~56) by fetching the current date from the internet instead of relying on the device's potentially inaccurate local clock.

Key Changes:

• Added fetch_current_date() function that fetches current date from worldtimeapi.org API
• Implemented 1-hour caching to minimize network requests
• Used HTTPS for secure communication
• Proper resource cleanup with try-finally block
• Graceful fallback to local time if network is unavailable
• No changes to existing date calculation logic (verified with tests)
• Improved cache timing to allow retries after failed fetches
• Reduced timeout to 3 seconds for better responsiveness
• Added comprehensive date parsing validation

Security:

• No vulnerabilities detected by CodeQL
• Using HTTPS for API requests
• Proper exception handling and resource cleanup

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