The dial, the digits and the date all follow your device clock and time zone. There is nothing to start and nothing to configure: the hands simply show the local time.
Runs locally in your browserLive local time
Time zone—
The page draws an analog clock from the clock and time zone your device reports: the hour, minute and second hands follow that time, and the digits under the dial repeat the same value so the exact second can be read at a glance.
There is no network time server behind the page — the display is as accurate as the device clock it runs on, and it keeps ticking with the connection switched off.
The hands are drawn from the device clock — the same value the browser hands to any page on the machine. Nothing is synchronised with an atomic clock or an NTP server, so the display is exactly as accurate as the system time it reads.
The time zone comes from the operating system as well, together with daylight saving. A device set to the wrong zone, or to the wrong date, moves the whole dial with it.
The face is a 12-hour dial: the hands make two full turns a day, so 09:15 and 21:15 look identical. The digits below the dial remove that ambiguity by naming the hour that is actually being shown.
All three hands move continuously rather than jumping once a minute, which is why the hour and minute hands rarely sit exactly on a tick — the behaviour of a mechanical watch rather than a flip clock.
There is nothing to configure: no start button, no account and no location permission. Leave the tab open and the clock stays current; the page only does arithmetic on the local time.
Nothing is submitted or stored: the clock is computed in the browser, and once the page has loaded it also runs offline, with the hands carrying on from the device clock.