An improved astronomical calendar clock mechanism, integrating a sun-centered planetary dial with an earth-centered celestial ring with a fixed orientation number dial located in the earth's equatorial plane, with the sun on a meridian track fixed at 12 on the number dial, and the meridian track indicates the date on a calendar band which is applied to the outside edge of the celestial ring in a plane parallel to the celestial equator, and an hour hand emerging from the earth globe at the center of the celestial ring indicates the time relative to the fixed orientation number dial framing the earth.