How long is a day on Saturn?
When do the centuries begin?
Why was there a year of 445 days?
And why in 1867 in Alaska there were two consecutive Fridays?

Measuring time is a specifically human activity, but how much do we really know about how and why the units with which we measure the flow of our lives were born? Paolo Gangemi intends to fill this gap: each chapter of
The measures of time is dedicated to one of them, and recounts the circumstances that led to its birth. What emerges from these pages is an overview of the difficulties and compromises, at times rather bizarre, that scholars and legislators have had to face in order to establish conventions that are as universal as possible. A book full of information, pleasant and fun to read, able to satisfy the reader with a specific scientific interest and those who simply want to follow unusual and curious paths between the pages of a good book.

Paolo Gangemi, mathematician and science journalist, made his debut in creative dissemination in 2007 with "Insalate di mathematics 2", translated into French with the title "Salades de mathématiques". In 2010 he published Rome mathematics. Itineraries for people who want to “count”, written with Wilma Di Palma, and in 2014 her first e-book, "Macedonia of mathematics". Coming out of the mathematical field, two of his greatest successes are "Little book of curiosities about the world" of 2012, and "Little book of curiosities about science" of 2016. His latest books are "Stories of love and science" of 2020 and "THE MEASURES OF TIME" of 2021.