"The Church Year and Kalendar" by John Dowden is a scholarly work written in the early 20th century. This book is part of "The Cambridge Handbooks of Liturgical Study" series and explores the historical development and significance of the Church's liturgical calendar, particularly its major feasts, fasts, and commemorations throughout the Christian year. It addresses how these practices emerged over time and the influential factors that shaped them within the early Church. The opening of the text sets the stage by noting the deep roots of the Christian liturgical calendar in Jewish tradition, particularly the seven-day week and its observable days of worship. Dowden outlines the fundamental importance of the Lord’s Day and describes how the early Church gradually established various feast days and observances, drawing from local martyrdoms and the significance of certain historical events in the life of Jesus Christ. Through this introductory discussion, readers gain insight into the development of liturgical practices, highlighting the intricate interplay between historical events, theological reflection, and the evolving Christian worship experience. (This is an automatically generated summary.)