Time Zone Converter
Pick a base city and time, then see the same instant in any number of cities worldwide — with work-hour highlights so you can plan international meetings at a glance.
How to use this time zone converter
- Pick your base city in the top-left.
- Choose 'Right now' for a live clock or 'Pick a time' to plan a future meeting.
- Add or remove cities from the chip list — they appear in the world-clock list.
- Color bands show good (9-17), edge (7-9, 17-20) and bad work-hours so you can pick a fair meeting time.
Frequently asked questions
Does it handle Daylight Saving Time?
Yes. The tool uses your browser's IANA time-zone database (via Intl) which knows the full DST history and rules for every supported zone.
What does '+1 day' or '-1 day' mean?
When the same instant lands on a different calendar date in another zone, the row shows a +1 or -1 badge — useful for spotting that 'Monday 9am New York' is 'Tuesday 1am Tokyo'.
Can I add cities not in the list?
The list covers ~30 of the world's most-searched cities. If a specific zone is missing, request it — adding new IANA zones is a one-line change.
Why does Phoenix show the wrong time when I pick US Mountain Time?
Arizona (except the Navajo Nation) does not observe Daylight Saving Time. From March to November, Phoenix is on Pacific Time effectively, not Mountain. Pick 'America/Phoenix' specifically — generic 'Mountain Time' assumes DST and will be an hour off half the year.