Day Symbols of the Maya Year Sixteenth Annual Report of the Bureau of American Ethnology to the Secretary of the Smithsonian Institution, 1894-1895, Government Printing Office, Washington, 1897, pages 199-266.

"Day Symbols of the Maya Year" by Cyrus Thomas is a detailed study about the ancient Maya calendar. The book looks closely at the special symbols used to mark the days and years. It explores the history, language, and culture of the Maya people to help readers understand how their calendar worked and what it meant to them. The work begins by examining the research of other experts and then presents the author's own ideas about what the symbols mean and how they sound. The author carefully examines each day symbol, starting with the first one, explaining its different forms and sounds, and analyzing its relationship to Maya myths and beliefs.