Free date and time tools
Compare time zones, measure the gap between two dates, convert Unix timestamps and time anything with a stopwatch.
Tools in this category4
- World ClockSimultaneous times across multiple time zones
- Date DifferenceCalculate days, months and years between two dates
- Timestamp ConverterUnix timestamp to readable date and vice versa
- Stopwatch / TimerStopwatch with laps and countdown timer
About these tools
Date arithmetic is deceptively hard — leap years, months of different lengths and daylight saving time all break the obvious approach. These tools use your browser's own internationalization engine, which carries the full time zone database, so the answers account for those rules.
The timestamp converter translates between Unix epoch seconds and human-readable dates in both directions, which is the fastest way to make sense of a log file, an API response or a database field.
Frequently asked questions
Does the world clock handle daylight saving time?
Yes. It uses the IANA time zone database built into your browser, so DST transitions are applied automatically.
What is a Unix timestamp?
The number of seconds elapsed since 1 January 1970 UTC. It is how most systems store a moment in time without ambiguity.
Does the stopwatch keep running in the background?
It keeps counting while the tab is open. Closing the tab resets it.