World clock, time-zone converter and meeting planner
Convert times between cities, watch a live world clock, and find meeting windows that work for everyone - free and accurate, with daylight saving handled automatically.
Coordinating across time zones is one of the most common frictions of remote work and travel. These tools remove the mental math, including the daylight-saving traps that catch people out twice a year.
Start here
How time zones work
Every location's clock is an offset from Coordinated Universal Time (UTC). New York runs at UTC-5 in winter and UTC-4 in summer because of daylight saving, while places like Arizona, Japan and most of the equator do not change at all. That mix of offsets and seasonal shifts is exactly why a tool beats mental arithmetic.
Frequently asked questions
How do I convert a time between two cities?
Pick the source city and time, then the destination city, and the converter shows the matching local time using each city's current time-zone rules, including daylight saving.
Are these tools accurate with daylight saving?
Yes. They use your browser's IANA time-zone database, which your device keeps updated, so daylight saving shifts are handled automatically.
What is UTC?
Coordinated Universal Time is the global reference from which all time zones are offset. London is at or near UTC; New York is typically UTC-5 or UTC-4 in summer.
How do I plan a meeting across time zones?
Use the meeting planner to see each participant's working hours side by side and find the window that falls within everyone's day.
Is GlobeOnTime free?
Yes. Every tool is free and runs in your browser; nothing you enter is stored on our servers.