Sun Clock

The Sun Clock – Natural Time

Gordon’s Sun Clock is a single-hand clock with a dial that changes daily.
It aligns time with the movements of the Sun, Moon, planets, and stars,
providing a direct visual connection to natural celestial rhythms.

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Why the Sun Clock?

Standard civil time often feels disconnected from nature:

• Daylight saving shifts distort daily rhythm
• True solar noon rarely occurs at 12:00
• Time zones override natural longitude
• Mechanical clocks ignore the actual sky

The Sun Clock solves this by generating a real solar-time dial for your location.

It shows:

• when true solar noon occurs
• how much daylight remains
• how day length changes with the seasons

No artificial time shifts — just natural solar time.

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What You See

The horizon divides the clock display:

Above the horizon

• Sun
• Moon
• Visible planets
• The ten brightest stars
• Their real-time positions in the sky

The Sun moves from left (east) to right (west) along a path that matches its real, daily arc.
(Automatically mirrored for the southern hemisphere.)

The Moon follows its own orbital path.
Planets and stars appear exactly where they actually are in the sky at that moment.

Below the horizon

All celestial bodies currently on the opposite side of Earth.

The Sun’s Path as a Clock Face

The solar arc doubles as a natural dial:

• Daytime hour positions
• Length of the day
• Sunrise and sunset
• Twilight behaviour
• Seasonal variation

At a glance, the clock shows where you are in the day and how the light is changing.

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What the Sun Clock Is For

• Reconnecting daily and seasonal life with natural rhythms
• Helping children understand astronomy intuitively
• Hanging as a wall clock to watch time drift with the seasons
• Observing:
  • solar eclipses (conditions & geometry)
  • lunar phases
  • planetary positions
  • the star field throughout the year

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Special Features

• Extremely precise calculations (Skyfield; accuracy ~0.0005 arcseconds)
• Fully location-dependent: works anywhere on Earth
• Offline operation after initial setup
• Optional second-precise Agnihotra times with countdown
• Temporal hours mode:
  • 12 unequal daylight hours
  • 4 night watches
  • historical timekeeping system
• Free, ad-free, private:
  • no tracking
  • no data collection

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Seven Years of Experience

I have lived with this clock for seven years.
It changed how I perceive time.

Through daily observation, I learned:

• the feel of seasonal light changes
• the true shape of the Sun’s path
• how short winter days really are
• how lunar phases evolve
• how stars shift with Earth’s orbit
• the meaning of the angle of sunlight

This project is the result of that experience —
and my gift to anyone wishing to reconnect with natural time.