World Clock
Compare current time across multiple cities. Use the slider to find meeting times that work for everyone.
Add Time Zone
How It Works
All times are generated using the browser's native Intl.DateTimeFormat API with IANA time zone identifiers. This means DST transitions, historical rule changes, and leap seconds are all handled automatically — no external API required.
The offset slider shifts all displayed times equally, helping you find a window where business hours overlap across all zones.
Features
- ✓ 120+ cities across 50+ countries
- ✓ Automatic DST handling
- ✓ Day/Night visual indicator
- ✓ ±12h meeting planner slider
Disclaimer: For informational purposes only.
About the World Clock
This world clock handles date arithmetic, time zones, calendars, and scheduling utilities. Compare current time across multiple cities and time zones.
Use for planning events, deadlines, workdays, and time-zone aware calculations.
Adjust the inputs above to model your specific scenario with the World Clock.
Explore More
Related Calculators
Clock
Full-screen live digital clock with timezone support, 12/24h format, and millisecond precision.
Cron Schedule Generator
Build, validate, and understand cron expressions with a visual builder and execution forecast.
Hours & Minutes Calculator
Add or subtract multiple time durations. Perfect for tracking project or travel time.
Reaction Time Calculator
Measure your visual reflex speed in milliseconds and compare to gamer and F1 benchmarks.
Stopwatch
Precise stopwatch with lap splits and millisecond accuracy.
Sunrise Sunset Calculator
Find sunrise, sunset, and day length for any location and date.