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Show sync icon
Simple mode (clock + timers, no graphics)
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Visibility and Activation
Enable Timer 1
Enable Timer 2
Enable Timer 3
Enable Timer 4
Enable Timer 5
Enable Timer 6

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Timer labels













Color thresholds


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About BIG RED CLOCK

This fullscreen clock shows the current time with centisecond precision, a date, and up to four countdown timers.

  • Click on the red clock to toggle control panels (timezone, timer settings).
  • Use the timezone selector to sync with a preferred region.
  • Each timer can be enabled, hidden, set to a target date/time, or reset individually or all at once.
  • Timers turn red when under 5 minutes remaining, orange under 15 minutes, and green after time has passed.
  • The Ω symbol shows whether time is synchronized: green = synced, yellow = failed.

Logo file: Place a file named logo.png inside the media/ folder.
Font file: Place the file NimbusSanL-Reg.otf inside the font/ folder.
Time sync API: The clock synchronizes time using the public endpoint https://timeapi.io.

This project uses the Nimbus Sans L font, licensed under the GNU General Public License v2.0 (GPL-2.0).