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How to use →



Made by Timo Heimonen
timo.heimonen@proton.me
Privacy · Terms · GitHub
Embed this clock

A+ carbon rating (<0.01g CO2/visit). Report.

Build dashboard

A+ carbon rating (<0.01g CO2/visit). Report.

How to use

Controls

Control Description
Theme (moon/sun icon) Switch between dark and light mode
Keep screen on (monitor icon) Prevent the display from sleeping
Tick seconds (stopwatch icon) Switch between ticking and smooth second hand
Info (ⓘ button) Show embed link, this help, and contact info

Screen burn-in protection

To protect OLED and AMOLED displays, the clock subtly shifts its position every 10 minutes in a slow circular pattern. Dark Mode further reduces the risk of burn-in. Protection does not apply in embedded mode. Use ?burnin=false to disable.

Install as app (PWA)

This site works as a Progressive Web App. You can install it on your phone or computer for a full-screen clock and offline use. Use your browser’s menu (e.g. “Add to Home Screen” or “Install app”) to install.

Timezones

Add ?tz= to the URL with any IANA timezone:

clocksimulator.com/?tz=America/New_York
clocksimulator.com/?tz=Europe/London
clocksimulator.com/?tz=Asia/Tokyo

Multi-clock dashboard

Show multiple clocks at once by separating timezones with commas. This automatically enables dashboardMode. Use &rows= to control the grid layout: 

clocksimulator.com/?tz=UTC,Europe/Helsinki,America/New_York
clocksimulator.com/?tz=UTC,Europe/Helsinki,America/New_York,Asia/Tokyo&rows=2 (dashboardMode)

You can also use the dashboard builder (ⓘ → Build dashboard) to visually add timezones and configure the grid.

Embedding

Embed the clock on any website via an <iframe>. Use the built-in embed panel (ⓘ → Embed this clock) to configure and copy the code.

Privacy

Read the privacy policy at /privacy.html and the terms of service at /TOS.html.

Sustainability

This web app runs on sustainable energy and achieves an A+ carbon rating (<0.01g CO2 per visit). View the carbon report.

URL parameters

Parameter Values Default
embed true —
tz IANA timezone(s), comma-separated Local time
rows Number (e.g. 2, 3) Auto
theme dark, light, transparent System preference
seconds tick, smooth, hide tick
border show, hide show
daynight show, hide hide
numbers show, hide show
shadows true, false true
burnin true, false true