Task by Task · Free local practice
Ask AI to build a small time-zone planning tool
Date-aware native calculation; no calendar connection. This authored example runs locally and does not call an AI service.
Give your AI-built tool a test that catches the bug
Keep the meeting at 14:00 in London and compare a fixed rule with named-zone conversion.
Read the source in text
- 20 October: London 14:00, New York 09:00.
- 26 October: London 14:00, New York 10:00.
- The source is one unambiguous instant; no calendar is connected.
Use named zones and an unambiguous instant. A permanent five-hour subtraction fails across these dates.
Use the instruction on your own work
Build a small offline time-zone planner in HTML, CSS and JavaScript.
Take an ISO timestamp with Z or an explicit offset as the source instant.
Show the full date, weekday and time in Europe/London, America/New_York
and Asia/Kolkata using date-aware Intl.DateTimeFormat handling.
Reject invalid or zone-free timestamps with an explanation.
Label the source instant and each named zone. Do not use fixed offsets.
Keep it local, with no calendar connection, tracking or invitation sending.
Return the actual downloadable files and instructions for opening them.