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livetime.now guides & articles

10 in-depth guides on Live Time and related topics.

Setup tips

Setup tips Second Monitor Clock: A Full-Screen Time Display On Your Spare Screen Turn a spare display into a clock that reads at a glance: getting the window onto the right screen, going fullscreen, keeping it visible, and dimming it sensibly. 5 min read Setup tips How To Get A Fullscreen Clock In Every Browser Shortcuts, menus and mobile workarounds for filling any screen with a clock, plus the Fullscreen API behind them and the snags that catch people out. 5 min read Setup tips How To Add A Live Clock For Streaming Overlays A clock overlay answers the question chat keeps asking. Here is how to add one as an OBS Studio browser source and keep it readable over moving video at real bitrates. 6 min read Setup tips Kiosk Clock Display: Running A Clock On Lobby And Signage Screens One screen, one page, no controls. How to run a clock in browser kiosk mode on lobby and signage displays so it stays awake, stays legible and stays correct for months. 5 min read Setup tips Screen Wake Lock And Battery: Keeping A Clock Awake Without Waste The Screen Wake Lock API keeps a display lit while a page is visible. Here is what it can and cannot do, what it costs in battery and panel wear, and when not to bother. 5 min read Setup tips Exam Timer Guidance: Timing Exams, Drills And Training Intervals A shared countdown removes guesswork from any timed session. How to choose countdown or elapsed time, place warnings, keep the display fair and visible, and plan a fallback. 6 min read

How it works

How it works How Accurate Is A Browser Clock? Browser Clock Accuracy Explained A browser clock is exactly as accurate as the device it runs on. Here is what it inherits from the system clock, how far hardware drifts without NTP, and how to check your own. 6 min read How it works Millisecond Precision In The Browser: Date.now() vs performance.now() Browsers expose two clocks with different guarantees. Here is how Date.now() and performance.now() differ, why background tabs throttle timers, and why animation frames beat intervals. 6 min read How it works NTP vs Browser Time: Where Your Clock Really Gets The Time Time reaches your screen through a hierarchy: atomic clocks, NTP servers, your operating system, then the browser. Here is what each layer does and where accuracy is won or lost. 6 min read How it works What Is Live Time? How A Live Clock Actually Works Live time is a clock that keeps advancing rather than a timestamp frozen at page load. Here is where the time comes from, how the browser keeps it moving, and what it can and cannot guarantee. 6 min read