Fullscreen Clock
A big, always-accurate clock — digital or analog — you can throw on any screen: a second monitor, a kitchen tablet, or a TV in a lobby. Pick a zone, hit fullscreen, and it keeps ticking with correct daylight saving handling.
Unlike a screensaver or a static clock widget, this clock is computed live from your device's clock and the IANA time zone database, so it stays correct through daylight saving transitions without any manual adjustment. Leave the tab open in fullscreen on a spare monitor, tablet, or TV and it keeps ticking accurately for as long as the screen stays on.
Frequently asked questions
Does the fullscreen clock keep my screen from sleeping?
Yes — where supported, it requests a screen wake lock while in fullscreen mode so the display won't dim or lock automatically.
Can I show a different city or time zone in fullscreen?
Yes, use the zone selector below the clock to switch between the UK and a range of popular world cities.
Can I switch between digital and analog?
Yes — use the mode button below the clock. The digital view can also switch between 12-hour and 24-hour format, and seconds can be shown or hidden in either mode. Your choice is remembered on this device.
Does this work on a TV, tablet, or digital signage display?
Yes — any device with a modern browser can open this page and go fullscreen, making it a simple free digital signage clock.