Sun Clock – Gordon’s

Gordon's Sun Clock – Natural Time

A single-hand clock with a daily-changing dial – aligned with the rhythms of celestial bodies and nature (shows solar position and starry sky)

–– Why Sun Clock?

I was dissatisfied with standard time, recurring daylight saving changes, and the fact that noon is rarely at 12 o'clock. My solution: an organic dial that displays true local solar time.

It shows when true noon occurs and how much daylight remains – for your individual location. No artificial railway time, no time shifts, just solar time.

–– What do you see?

The horizon divides the screen. Above it: the sky with sun, moon, planets, and the ten brightest stars. Below: celestial bodies on the other side of Earth. The sun travels throughout the day from left (east) to right (west) along its marked path, just like in the real sky (reversed in Southern Hemisphere). The moon has its own orbit. Planets and stars show their positions.

The sun's path functions as a clock face: hour marks indicate the time of day. At a glance, you see how long the day is, when night falls, and how this changes with the seasons.

–– What is Sun Clock for?

• Reconnection to natural rhythms – not just daily, but seasonally
• Children intuitively understand the movements of stars and celestial bodies
• Wall clock: Hang it on the wall and observe the natural change of time daily
• Astronomy: Observe conditions for solar eclipses, full/new moons, and planetary positions

–– Special features

• Precise calculations accurate to 0.0005 arcseconds (Skyfield)
• Location-dependent: Works worldwide with your coordinates
• Offline: No internet connection needed after initial setup (GPS time sync available)
• Optional second-precise Agnihotra times with countdown
• Temporal hours display: 12 unequal daytime hours & 4 night watches – historical time system
• Free, ad-free, privacy-friendly: no tracking, no data collection

–– Seven years of experience

I've lived with this clock for seven years. It taught me to connect more with natural rhythms. The changing paths of sun and moon show me how short winter days are, how lunar phases work, etc. I recognize the angle of sunlight and see the starry sky.

This app is my gift to the world.

• Gordon's Sun Clock is also known as: Astronomical Clock, Horologium, Horologion, Orloj, Astrolabe, Star Clock, Celestial Clock, Single-Hand Clock, Solar Clock, Temporal Hour Clock