Business Days Calculator
Custom work weeks and holiday lists.
- Free
- No signup
- No login
Inputs
Result
How this tool works
Each card reads the IANA time-zone data in your browser, so the time, date and UTC offset are correct for today, including daylight saving.
Add a city by typing its name or an IANA identifier such as Asia/Tokyo. Your list is saved in this browser only.
Time-zone rules come from the IANA database in your browser. This server uses database version 2026.5. If governments changed a rule very recently, the two can briefly disagree, so confirm important meetings with participants.
Frequently asked questions
Why is there no abbreviation like EST on some clocks?
An abbreviation is shown only when the browser provides a real one. Many zones, for example Asia/Riyadh, have no reliable abbreviation, so only the UTC offset is shown.
Where is my list of cities stored?
In your browser's local storage on this device. It is not sent to our server. Clear it with "Clear saved preferences" in the footer.