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What is an IANA timezone?
Named zones encode daylight saving transitions and historical corrections, which fixed UTC offsets cannot represent accurately year-round.
How to use this tool
Search cities, add pins, compare offsets. Use shortcuts for frequent zones. Open the full tool for expanded layouts.
Use cases
Distributed teams, on-call handoffs, customer support windows, travel planning.
Privacy and security
Editor and conversion workflows run in your browser without uploading your content to our servers for those steps. Clear sensitive data when you finish, especially on shared machines.