Browser/PWA version of Gordon's Sun Clock – A single-hand clock with a dial that changes daily, based on the rhythms of nature and the stars. A new way of displaying time that moves in harmony with the seasons
This repository contains the web implementation of the natural-time sun clock, including local astronomical calculations, offline support, and the canvas-based dial. It is the ongoing web port of the original Android/Python app.
The web version uses JavaScript-based astronomical calculations (including VSOP87 and IAU 2000B), and does not provide the full Skyfield precision of the Android/Python version (JPL DE440 ephemerides). Some app features are still missing or incomplete, such as sun-based alarms and multiple designs.
- Accurate solar positioning: Within VSOP87 & IAU 2000B limiations (see Android app for JPL precision)
- Single-hand design: Simple, clear, intuitive
- Location-based: Adjusts to your coordinates (manual input or location detection)
- Real time set/rise: Sun and Moon rise and set according to their apparent size
- Installable: As a progressive web app
- Offline capable: No internet required after first setup (PWA)
- Optional weather overview: Clear icon-based, drama-free daily outlook
- Temporal hours clock: Display of ancient unequal hours (12 day hours & 4 night watches) – e.g. for historians or anyone seeking a deeper connection to historical timekeeping
- Time travel: explore past and future, even up to the sky at your birth
- Meteor showers: the eight major streams with search area and radiant
- Agnihotra support: Display precise Agnihotra times with countdown
- Tablet mode: Hang on your wall as a living clock (maybe the Android app ist better suited for this)
- Multi-language: Deutsch, English, Español, Français, Русский, 中文 plus some autotranslated languages
- Free & private: Free of charge, no ads, privacy-friendly
Link to Astronomical Clock: https://astronomicalclock.eu/
Short link: https://sky12.de/
Main Android repository: https://github.com/gaxmann/gordonssunclock
If you enjoy Sun Clock, please consider:
- Telling others about it – Short link: sky12.de
- Leaving a positive review on Play Store
- Reading what others say on the Voices on Sun Clock wiki page
Enjoy using Sun Clock ☀️