The Geo Soleil® Light Tracker® is a unique down-loadable timepiece-calendar which tracks the amount of sunlight available at a particular location on earth on a particular day, and throughout the day. The Geo Soleil® Light Tracker® indicates month, day, date, and time in both digital and analog presentations, the general local weather and moon phase, and in addition, is oriented to the Spring and Winter Equinoxes, and the Summer and Winter Solstices.

A software application with analog and/or digital clock and yearly calendar, featuring a 24-hour daily sunlight indicator displaying for a selected location the expected amount of daily light and shade, the moving light and shadow patterns at the selected location and/or the phases of the moon each day.