This book chronicles significant events in the history of rugby union, presented day by day. It aims to provide a comprehensive overview of the sport's evolution, highlighting key matches, player milestones, and rule changes that have shaped rugby into the game it is today. The content is organized chronologically, offering readers a structured way to explore the sport's rich past.

The 'On This Day' format suggests a reference work designed for enthusiasts who enjoy historical trivia and chronological exploration of a specific subject. The focus on daily events implies a detailed and fact-driven approach, likely appealing to dedicated rugby fans seeking to deepen their knowledge of the sport's past. The structure lends itself to casual browsing or targeted research into particular dates or eras.