The artist carved the Aztec calendar stone in 1479. Naturally, it was dedicated to the sun god. It was a massive carving, 3 feet thick, almost 12 feet across, and weighing almost 25 tones (22.5 tonnes). It was carved from basalt-a solidified lava, this being an area where volcanos were common.he 13 day period is a kind of Aztec week. Not only was every day ruled by a god, each of the weeks were also ruled by a god-the one associated with the first day. Find out today's date, or your birthday according to the Aztec calendar stone on this site ! More on the background and origins of the Aztec calendar.