The book "Primitive Timekeeping: A Study of the Origin and First Development of the Art of Timekeeping among Primitive and Early Civilized Peoples" is the result of the research of Martin Persson Nilsson. In his book, the author examines in detail the evolution of timekeeping methods in primitive societies and in the early stages of human development. He examines the methods of measuring time used by ancient peoples and the development of this process in the initial stages of civilization. Nilsson analyzed various timekeeping systems, recreating the way in which timekeeping was gradually normalized in early societies. In particular, he examines the use of natural phenomena, astronomical signs and the cosmic cycle in the ways of measuring time among different tribes and peoples. "Primitive Time Measurement" gives readers the opportunity to dive deep into the history of the development of time accounting systems and answers the question of how humanity organized its conception of chronology in its earliest beginnings.