Autographed by the Author. The V Bar V Heritage site is about 12 miles southeast of Sedona, Arizona, within the Red Rock District of the Coconino National Forest. A sandstone bluff, heavily coated in desert varnish, contains over 1,300 petroglyphs. One of the primary west-facing panels, with more than 125 petroglyphs, includes eleven elements that are ascribed to have astronomical associations.  This study documents the recording of time over a 12-month period through the play of light and shadow on the images, and by the use of natural or man-made features on the bluff. It shows that the light and shadow patterns display their unique configurations at specific times. With years of observations, the Sinagua and other prehistoric sunwatchers, would have noted the repetition of certain events at regularly spaced intervals, most easily seen during the solstice and equinox events.