Free Time Zone Tool
Time Zone Converter
Convert time between cities and time zones
Enter a date and time in one city and instantly see the corresponding local time anywhere in the world. Daylight saving time is handled automatically.
Convert a time
Popular time zone conversions
Tap a pair to load it into the converter above.
Current local times
The actual current time for your two selected cities — separate from the date and time you're converting above.
Planning a meeting across time zones?
Compare working hours for multiple people and find the best meeting time automatically.
How to convert time zones
- Choose the city where the original time applies.
- Enter the date and local time.
- Choose the destination city.
- The converter calculates the corresponding local time using the correct time-zone rules for that date.
Why time zone differences change
Many countries observe daylight saving time, shifting their clocks forward or back once or twice a year — but not every country does this, and the ones that do rarely change on the same date. The United States, for example, moves its clocks on different dates than most of Europe.
For a few weeks each spring and autumn, this means the gap between two cities like New York and Zurich isn't the usual number of hours — it's temporarily one hour more or less, until both regions have made their seasonal change. That's why the converter always calculates the offset for the specific date you choose, rather than assuming a fixed difference.
Frequently asked questions
How do I convert time between time zones?
Choose the city where the original time applies, enter the date and local time, then choose the destination city. The converter calculates the corresponding local time using the correct time-zone rules for that date.
Does the Time Zone Converter account for daylight saving time?
Yes. Every conversion is calculated for the specific date you select, using each city's own daylight saving rules, so the result is correct even when the two zones change their clocks on different dates.
Why does the time difference between two cities change?
Many countries observe daylight saving time, but not all of them, and not on the same dates. When one city shifts its clocks and the other doesn't, the gap between them temporarily changes by an hour.
Can a converted time fall on the previous or next day?
Yes. Because time zones can be many hours apart, a time late in the evening in one city can correspond to the early morning of the next day elsewhere — and the reverse for cities behind you. The converter labels this clearly.
What time zone does a city use?
Each city in the tool is mapped to its real IANA time zone identifier (for example America/New_York or Europe/Zurich), which already encodes that region's current and historical daylight saving rules.