About ZoneClock

ZoneClock is a fast, privacy-focused time zone converter and meeting planner. Compare time zones between any two cities, see shared working hours at a glance, and find the best time to schedule meetings across the globe.

No sign-up required. No personal data collected. Just clean, accurate time zone information when you need it.

How it works

Select any two cities to see their current time difference, shared working hours (9 AM-5 PM local time), and upcoming daylight saving time changes. The meeting planner view highlights the best overlap windows for scheduling calls.

Questions?

Time zone data is sourced from the IANA Time Zone Database and updated regularly. All calculations happen in your browser for speed and privacy.