 The second section, spanning pages 8 to 24, is a "tonalamatl", describing the 260-day "tonalpohualli" calendar.The third section is a history, itself divided into two sections which differ stylistically.Pages 25 to 28 are an account of migrations during the 12th and 13th centuries, while the remaining pages of the codex record historical events, such as the ascensions and deaths of rulers, battles, earthquakes, and eclipses, from the 14th century to the 16th century, including events of early Colonial Mexico.