Online Stopwatch

I have developed and made this online stopwatch available to you.

In addition to having a start and stop function, this stopwatch features a button to record laps and restart the stopwatch after it has been stopped.

Each lap displays the time difference with the previous lap.

The format used is <HOURS>:<MINUTES>:<SECONDS>:<MILLISECONDS> (HH:mm:ss:SSS).

Usage

This stopwatch is very basic and meets the most elementary needs.

Example of usage:

1. Click "Start" to launch the stopwatch.
2. Use the "Lap" button to record a lap without stopping the stopwatch.
3. Click "Stop" to pause the stopwatch.
4. Press "Restart" to continue timing from where it was paused.
5. Use the "Reset" option to bring the stopwatch back to zero.

Anecdotes about time

The Atomic Clock

It was in 1949 that the first atomic clock was invented, making the measurement of time much more precise.

Time in Computing

Did you know that time in computing is not based on a conventional calendar but on integers?

Depending on the operating systems, there are several "zero" time references:

• Unix: January 1, 1970.
• Windows: January 1, 1601.
• Mac: January 1, 1904.

Computer systems then convert this integer into a human-readable date. For example, the date 1735686000 will be displayed as 01/01/2025 00:00:00.