IconVault's World Clock shows live ticking clocks for major world cities side by side, from New York and London to Dubai, Mumbai, Singapore, Tokyo and Sydney. Add or remove any time zone, toggle between 12-hour and 24-hour format, and see at a glance who is awake, who is asleep, and whether your meeting time is sane for everyone invited.

It uses your browser's built-in time zone data, so times stay correct through daylight saving changes with no manual updates. It is free, runs entirely in your browser with no signup, and is perfect for remote teams, freelancers with global clients, travelers, and anyone scheduling across time zones.