In this calendar, each animal represents a year, and it is believed that each year is shaped by the characteristics of its respective animal. For example, the Year of the Monkey is believed to bring increased fun and trickery. The calendar progresses in cycles called Çağ, which consists of 12 x 5 = 60 years — approximately the average human lifespan. The 12-Animal Turkish Calendar begins with the accession of Mete Han to the throne in 209 BC.