Abstract: A clock for automatically indicating the time of day, the data of the year, the approximate time of sunrise and sunset, the approximate hours of darkness and daylight, the positions of the sun, Mercury, Venus, the earth's moon and phases of the moon, the sign of the Zodiac and degrees of arc of the sign of the Zodiac which the earth is in, all relative to the earth in a geocentric model. The clock includes a center hub representative of the earth, about which an hour disk rotates one revolution clockwise per day, a superposed data disk, an hour pointer and data pointer for indicating the hour and calendar data. The clock further includes a cam lever that oscillates about a pivot point in response to movement about a stationary cam at one end for automatically rotating Venus and Mercury indicators about a sun indicator, and automatically rotating a moon indicator about the center hub. Sun, Mercury, Venus indicators also rotate about the center hub.