Compare zones, not just hours
View two to six cities side by side with live clocks, deltas and a 24-hour timeline that shows working overlaps at a glance.
Common Hour is a free, fast world clock and meeting planner built for global teams, families spread across oceans, and professionals living between three time zones. Compare cities, visualize daylight saving time and instantly find the exact moment when everyone can meet.
View two to six cities side by side with live clocks, deltas and a 24-hour timeline that shows working overlaps at a glance.
Apply a working schedule to every clock and get a window that works for everyone. Drag the marker and the whole grid updates in real time.
The WORLD map groups 54 cities by continent with live day/night. Search with `/`, continent filters and keyboard shortcuts.
Every country has its own page with all its zones, daylight saving data and nearby neighbors to coordinate regional meetings.
We believe coordinating across time zones should be instant, visual and frictionless. Common Hour exists so no "when works for you?" email takes more than three minutes to resolve, and so international meetings always start with everyone awake and present.
We imagine a world where anyone, anywhere, can plan a call with family, teammates or clients with the same ease as opening a browser tab. Common Hour wants to be the default landing page of everyone who lives between time zones.
Open Common Hour, add the cities that matter and share the link with your team. No sign-up required.