The work is divided into six sections:

1. Technical preparation (Chapters 1-4)

2. The Julian calendar (Chapters 5-41)

3. Anomalies of lunar reckoning (Chapters 42-43)

4. The Paschal table (Chapters 44-65)

5. The world-chronicale (Chapter 66)

6. Future time and the end of time (Chapters 67-71)