Pastors are challenged to find fresh ways to address familiar themes and secular celebrations within their sermons. J. Ellsworth Kalas, a seasoned preacher, argues in Preaching the Calendar that holidays and special days offer significant opportunities to deepen spiritual yearnings. The book provides guidance on how to effectively preach on these occasions, drawing connections between secular observances and the Christian gospel. Kalas demonstrates how embracing the church and civil calendar can yield valuable stories and illustrations for pastors seeking to foster renewed relationships between people and God.

The book is presented as a practical resource for clergy seeking to enhance their preaching by engaging with the church and civil calendar. It aims to equip pastors with the tools to deliver fresh and relevant messages, even on familiar themes or during secular holidays. The focus is on the strategic use of these occasions to deepen spiritual connections and foster renewed relationships with God. The author's experience as a preacher informs the advice offered, suggesting a grounded and actionable approach for ministry.