The book "The Systems of Human Days and Years" explores unique questions related to a novel system of calculation and its influence on human development. Drawing on universal numerical laws, the author, A. A. Nikolsky, presents an original concept linking the decimal numbering system with the internal and external cycles of human life.

Key topics include the interconnection between a person's daily and yearly cycles, grounded in developmental matrices for men and women, and a hypothesis proposing that the decimal system embodies a distinctive theory applicable to human evolution.

This book will be of interest to researchers in philosophy and anthropology, as well as anyone intrigued by questions of evolution and the patterns of life.