Time Zone Converter
Convert times between time zones, with date, time, and offset included, and organize your appointments across time boundaries. GDPR-compliant.
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How to use this tool (video)
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Time Zone Converter: Convert Times Around the World
Whether it is a video call with a team in the US, an email deadline with a client in Asia or travel planning: when your schedule depends on dates and times, you need a reliable answer to how late it is elsewhere. This time zone converter turns your local time into the target zone and shows the current offset between the two.
How it works
Pick a source and a target zone, enter a date and time and click Convert. The tool uses the built-in Intl API of your browser with the official IANA time zones. It turns your entered wall-clock time into the matching UTC instant and renders it in the target zone. The UTC offsets and daylight saving time (DST) of every zone involved are handled automatically, so you do not need to remember whether CET or CEST currently applies; the date is checked just like the time.
Worked example with real numbers:
- In winter: 20 January 2026 at 21:00 in Berlin (Europe/Berlin, UTC+1) is 15:00 the same day in New York (America/New_York, UTC-5). The offset is 6 hours.
- In summer: 20 July 2026 at 21:00 in Berlin (CEST, UTC+2) is also 15:00 in New York (EDT, UTC-4), because both zones switch to daylight saving at the same time.
Common zones from Germany
- Europe/Berlin: your local base time, UTC+1 in winter and UTC+2 in summer.
- US East Coast (New York): 6 hours behind Berlin, in winter and in summer.
- US West Coast (Los Angeles): 9 hours behind Berlin, both seasons.
- Japan (Tokyo) and China (Beijing): 7 and 8 hours ahead of Berlin, no daylight saving.
What the converter can do
- Convert a wall-clock time between two IANA time zones
- Take date and time into account together
- Handle daylight saving per zone automatically
- Show the current offset between the two zones
- Copy the result directly to the clipboard
What it can and cannot do
The converter works with the currently known offset and daylight-saving rules stored in your browser, so results are correct for today and the future. An exact historical conversion can be more complex: changes to daylight-saving rules, political changes of time zones or outdated data can affect past cases. The conversion also depends on your input; if date or time is missing, the tool prompts you accordingly. Everything runs locally in your browser, and nothing is sent to a server.
Why the converter matters
It helps with scheduling across time zones (video calls, meetings, deadlines), with travel, and when dealing with international teams, suppliers or clients. Because daylight saving starts and ends at different times in different countries, the converter takes the manual lookup off your hands and works with the exact date you enter.
Frequently asked questions
How does the time zone converter work?
It uses the built-in Intl API of your browser with the official IANA time zones. It converts your entered local time into the matching UTC instant and renders it in the target zone, handling daylight saving automatically.
Why does the offset differ between summer and winter?
Because many countries observe daylight saving time but not all switch on the same date. The offset between two zones can therefore shift by one hour depending on the month. The tool uses the exact date you enter.
Which time zones can I select?
The list contains the most important zones for Europe, North and South America, Asia and Oceania as well as UTC. Each zone uses the official IANA identifier, such as Europe/Berlin or America/New_York.
Are historical conversions exact?
The converter uses the offset and daylight-saving rules currently known in your browser. Results are correct for today and the future; very old dates from periods with different rules may differ, because historical changes are not always fully stored.
Are my data stored?
No. The conversion runs entirely in your browser. Neither the date, time nor your zones are sent to or stored on any server.