Mongolian astrology. 19th-century chart showing representations of 12 constellations of the zodiac and other aspects of Buddhist cosmology as used by Mongolian astrologers. The zodiacal signs are represented by animals in the outer circle (identical to the Chinese zodiacal signs), with other symbols in the central circle and square. The astrologers calculated calendars with auspicious days for various activities and forecast seasonal climate, eclipses, and other events based on the positions of planets, the Sun, the Moon, and the constellations. This manuscript follows the Tibetan tradition of the Kalachakra Tantra, which dates from 1024.