How to Use Global Clock Converter:
- Select a starting city from the "From" dropdown (e.g., "New York, USA").
- Pick a date and time using the calendar input (e.g., 2025-03-30 14:35).
- Choose a destination city from the "To" dropdown (e.g., "Tokyo, Japan").
- Click "Convert" to see the equivalent time in both locations, displayed vertically below.
- If no time is selected or it’s invalid, an error message appears.