Sky Horizon Clock

The sun by day and the moon by night crossing a dotted arc over the horizon, in the colours of today’s real sky.

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About the Sky Horizon Clock

Sky Horizon is a 24-hour clock drawn as a horizon. A dotted arc runs from sunrise to sunset, and the sun travels it through the day and the moon, at its real phase, through the night. Behind them the sky is a gradient in the colours of the sky right now, from deep indigo before dawn through rose, pale gold and clear blue to amber, violet dusk and night, reflected on the ground below.

The time is set in big numerals, always in 24-hour figures, with the date, the part of the day and the daylight left. Seconds can be shown too. Sunrise and sunset are today’s real ones, worked out in your browser for your time zone, so it asks for no location and sends nothing anywhere.

What you get

Free, full-screen, and browser-based — nothing to install
Works on phones, tablets, laptops, and desktops
Optional seconds display
No ads, no cookies, no account needed

Frequently asked questions

Is the Sky Horizon Clock free to use?

Yes. The Sky Horizon Clock is completely free, with no ads, no accounts and no cookies. Just open it in your browser and it runs.

Do I need to download or install anything?

No. The Sky Horizon Clock runs entirely in your web browser — there is nothing to install and no account to create.

Can I use it in full screen?

Yes. Open the clock and enter full screen to turn any monitor, laptop, or tablet into a dedicated sky horizon clock.

Can I show or hide the seconds?

Yes — this design supports an optional seconds display, which you can toggle from the clock settings.

Does it work on my phone?

Yes. The Sky Horizon Clock is responsive and works on phones, tablets, laptops, and desktops.

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