What is a world clock?

A world clock displays the current time across multiple timezones simultaneously. This tool also includes a visual overlap finder that shows working-hour windows across timezones, making it easy to schedule meetings with people in different regions.

How it works

Timezones are defined as offsets from UTC (Coordinated Universal Time). The IANA timezone database (e.g., America/New_York, Europe/London) maps region names to their current UTC offset, accounting for daylight saving time transitions automatically.

How to use this tool

• Add timezones to see live clocks side by side
• Use the overlap finder to visualize shared working hours across all added timezones
• Click on a time slot to see the corresponding time in every timezone

Common use cases

• Finding overlapping working hours for distributed teams
• Scheduling meetings across US/Pacific, Europe/Berlin, and Asia/Tokyo
• Checking the current time for clients or colleagues in other regions
• Planning deployment windows in production timezones