Convert a date and time from one time zone to another, with daylight saving time handled automatically, and see the same moment in other major cities.
How time zone conversion works
Every time zone is an offset from Coordinated Universal Time (UTC). New York is UTC−5 in winter and UTC−4 in summer; London is UTC+0 in winter and UTC+1 in summer. To convert, the calculator turns your time into UTC, then into the target zone, using your browser's up-to-date time zone database, so daylight saving time is handled automatically.
Worked example
A call at 2:00 PM in New York on a winter date (Eastern Standard Time, UTC−5) is 7:00 PM in London, 8:00 PM in Paris and 4:00 AM the next day in Tokyo. In summer, when New York and London both observe daylight saving time, the gap between them is still 5 hours, except for a few weeks in March and in October or November when their changeover dates differ.
Daylight saving time traps
- The U.S. and Europe change clocks on different dates, so the gap between them shrinks by an hour for a few weeks each spring and fall.
- Arizona (except the Navajo Nation) and Hawaii do not observe daylight saving time.
- Southern Hemisphere places such as Sydney move their clocks in the opposite season.
Tips for scheduling across time zones
- Always state the time zone in invitations, for example "2:00 PM ET".
- Rotate inconvenient meeting times fairly between teams.
- Use the table to find a time that falls within working hours for everyone.
Frequently asked questions
What is the difference between UTC and GMT?
For everyday purposes they show the same time. UTC is the precise scientific standard; GMT is a time zone used by the UK in winter.
Why does the converted day change?
Large time differences can push the time past midnight, so the date may be a day earlier or later in the other city.
Related tools
Results are estimates for planning and education only. They are not financial, tax, legal or medical advice. Check important numbers with a qualified professional.