Visualize the Sun's Path
Easily get a feel for which part of the day you are in.
Align your life
with the sun.
Track the sun at a glance.
Works offline with GPS
A complete solar toolkit
in your pocket.
Set Alarms by the Sun
Schedule alarms relative to sunrise, sunset, or solar noon.
Wake Alarm by Sleep Duration
Choose how long you want to sleep and dynamically wake after that long.
Sleep Window by Sunset or Sunrise
Set your sleep window in relation to sunset or sunrise.
Countdown to Sunrise & Sunset
Always know how long until the next sunrise or sunset.
A Calendar by the Sun
A calendar grounded in the cyclical energies that shape the earth.
From sundial to solar clock.
Sun Based Time is the modern progression of the original sundial. A visual reference that connects you to the cycle of the sun, in a format built for today.
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Origin
Ancient Origins
The 24-hour day dates back to ancient Egypt, where daylight was measured by sundial and each hour stretched or shrank with the seasons. Equal-length hours came later from Greek astronomers, spreading with mechanical clocks in medieval Europe.
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Shift
Industry Needs
Railroads and telegraphs made local solar time impractical. Time zones were adopted at the end of the 1800s, creating a disconnect from solar cycles that Daylight Saving Time only deepened.
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Return
A Brighter Future
Sun Based Time is the modern progression of the original sundial. A tool that can guide us toward circadian synchrony in a format intuitive for the modern world.
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Period 1 of 4
Sun Rising SR
The day begins at sunrise — 00:00 SR. The clock counts upward as the sun climbs, peaking at solar noon when the sun stands highest in the sky.
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Period 2 of 4
Sun Setting SS
Past solar noon, the period becomes SS. The clock counts down as the sun descends, hitting 00:00 SS in the final seconds before the sun dips below the horizon.
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Period 3 of 4
Night Rising NR
The sun has set. The clock rolls over to 00:00 NR and counts upward through the first half of night toward solar midnight — when the sun sits directly beneath your feet.
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Period 4 of 4
Night Setting NS
Past solar midnight, the clock counts down through NS toward the next sunrise. The 24-hour cycle completes, and a new day is ready to ignite.
Available on
iOS and Android.
"The breeze at dawn has secrets to tell you. Don't go back to sleep."
— Rumi