Meet Our New Universal Time Converter
A call at 9 a.m., a flight arrival or a server log entry can mean something quite different depending on the time zone. Our new universal time converter puts two local dates and times side by side, so you can check the hour and the calendar day together. It is free, works locally in your browser and needs no account, in English or French.
See the same moment in two places
Choose a city on the map or search for a named time zone, then edit the date or time directly on either card. Move through the day with the slider to see how an afternoon in one place lines up with an evening or the next morning elsewhere. You can use a 12-hour or 24-hour clock, whichever is easier to read.
The date matters. Paris and New York usually have a six-hour difference, but their clocks change on different dates. On January 15, 2026, noon in New York is 6 p.m. in Paris; on March 15, it is 5 p.m. The converter uses the selected date’s time-zone rules instead of assuming a fixed difference. The tool flags skipped hours and asks which occurrence you mean when an hour repeats.
Make sense of a timestamp
An API response or log file might give you an ISO 8601 date, Unix seconds or Unix milliseconds. Import that value to see its local date and time, or copy the standard timestamps alongside your converted times. This helps when comparing a user’s report with an event recorded in UTC.
Measuring how long code takes is a different task. Our article on JavaScript clocks and performance measurements explains why an elapsed-time clock is better suited to that job.
Share the conversion
Copy the share link to send someone the same instant, both time zones and your clock format. They can open it and adjust the conversion themselves. Anyone with the link can read those values, so treat it as a shareable reference.
Try the universal time converter with your next call or a timestamp you need to check. The guide below it explains UTC, date changes and daylight saving, with conversion examples in JavaScript and Python.