What is this tool?
This page shows your current local time side by side with GMT (Greenwich Mean Time / UTC), updating automatically every second. Your timezone is detected directly from your browser or device settings — no need to pick it manually — and GMT is calculated straight from your device's own clock, with no external server involved.
What is GMT (Greenwich Mean Time)?
GMT is the zero-degree line of longitude that every timezone in the world is measured from, either ahead (+) or behind (−) it by a set number of hours. Today the term UTC (Coordinated Universal Time) is technically more accurate in most systems, but in everyday use it is often treated as a synonym for GMT.
Why does knowing GMT matter? It's used as a shared reference in aviation, international systems, programming and cross-timezone communication — instead of relying on a local time that can shift with daylight saving.
Where does the time shown come from?
The time shown relies entirely on your device's clock and its operating-system timezone setting. If your device's clock is set automatically (the default on most phones and computers), the time shown here is accurate. If your clock is set manually and isn't quite right, that will be reflected here too — check your device's date & time settings if you suspect it's off.
Frequently asked questions
How does the tool know my timezone?
Your timezone is read automatically from your browser or operating system settings, without needing your location or any permission prompt.
Does the tool need location access?
No, it never requests location permission; the timezone comes straight from system settings and is general information that doesn't reveal your exact location.
What if my device's clock is wrong?
The tool shows your device's clock exactly as your operating system has it set; if it's inaccurate, turn on automatic date & time in your device settings.
Does the time update automatically, or do I need to refresh?
It updates automatically every second without needing to reload the page.
Is my data or location stored?
No, nothing about you is stored or sent; the tool only displays the time inside your browser.
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