Time Zone Converter
Compare local times between any two cities. DST-aware calculations using your browser's built-in Intl API.
Popular routes with time differences
When this time zone converter is most useful
- Scheduling meetings across continents before sending invites
- Planning arrival and check-in windows for international trips
- Checking DST-season changes before recurring calls
- Comparing business-hours overlap before travel
Common mistakes this avoids
- Assuming the same offset year-round
- Forgetting one city changes clocks earlier/later than another
- Using country-level offsets instead of airport/city time zones
- Planning calls without business-hour overlap checks
Important limitation
Local daylight saving rules can change due to government policy. For critical operations, confirm with official local time sources close to the event date.
How offsets are calculated
JetLag Planner uses IANA time zone identifiers and date-based calculations. See our methodology and editorial policy for assumptions and update practices.