SunCalc is a unique online application designed to provide users with a detailed understanding of sun movement and sunlight phases based on their location. Developed by Volodymyr Agafonkin, this interactive tool allows users to visualize the position of the sun throughout the day, including key times such as sunrise, sunset, and solar noon. The application's thin orange curve illustrates the current sun trajectory, while the varying yellow area indicates the range of sun paths throughout the year, helping users comprehend the sun's height at different times.

With features that include a time slider to show sunlight coverage, SunCalc is an invaluable resource for outdoor enthusiasts, photographers, and anyone interested in solar dynamics. Although the interface has not been updated in 15 years, plans are underway for a new version that promises enhanced functionality. Utilizing advanced technologies like Google Maps API, jQuery, and pure JavaScript, SunCalc continues to offer users a compelling and informative way to track sunlight phases at their precise locations.