The Kaalachakra Astrology, a part of Kaalachakra Tantra, is the highest form of Tantra in esoteric Buddhism. The Kaalachakra literally means the 'Wheel of Time'. Tibetan Buddhism referred to the Kaalachakra not only for divination, but also to compile their religious almanac.
The Buddhist almanac, like any regular Indian almanac, specifies certain dates which are good and bad for different purposes, like buying property and gold, traveling, getting engaged or married and so on. The birth chart of a newly born child would be cast by referring to this astrological chart.
The Astrological Wheel of Buddhism very closely resembles the Indian astrological chart, giving details about planetary positions, most profitable days for business in that particular month, most auspicious days and so on.
The metal sculpture you see featured here beautifully and artistically depicts the Astrological Wheel of Buddhism in all its detail and splendor.