World Timezone Reference
Compare local time between any two of 213 cities on 6 continents, with DST handled by IANA rules, plus a searchable full time zone reference table.
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World Timezone Reference
Airport Code Reference
Socket Voltage & Plug Type Quick Reference
Emergency Telephone Numbers
World Holidays & Festivals
World Date & Number Formats
Compare local time between any two of 213 cities on 6 continents, with DST handled by IANA rules, plus a searchable full time zone reference table.
Data last maintained
About World Timezone Reference
IANA zone, UTC offset, and DST fields
The table records key cities and capitals with country, IANA timezone identifier, standard UTC offset, DST offset when applicable, and typical DST months. The data is maintained from tzdata-aligned references for quick planning.
Search, continent filter, and sorting
You can search by city, country, IANA identifier, or offset text, filter by continent, and sort by UTC offset or name. The selected search, continent, and sort mode are kept in the shareable table URL.
DST-aware city time comparison
The calculator uses each city's IANA timezone at the selected instant instead of subtracting fixed offsets. It shows date changes and warns when a local time is skipped or repeated during a DST transition.
Verify exact dates for commitments
Timezone laws and daylight-saving schedules can change. The converter follows the IANA rules available in your browser, but for flights, contracts, meetings, releases, or deadlines, confirm the exact local time with the relevant airline, calendar, system, or authority.
FAQ
Common questions and answers about this topic.
How do I calculate the time difference between two cities?
Choose city A and city B. The calculator shows both local times, their exact difference, UTC offsets, and whether the target is on the previous or next day.
Does the timezone converter handle daylight saving time?
Yes. It uses each city's IANA timezone at the chosen instant and warns when a clock change makes a local time nonexistent or ambiguous.
Can I share a city time conversion?
Yes. The share button creates a URL containing both selected cities and the optional local date and time.
Data Sources
This tool's data is compiled from the authoritative sources below.
Data last maintained