The original meaning of "hol-i-days" was "holy days." Today many try to avoid the significance of the Christian holy days with the greeting, "Happy holidays," not discerning the historical meaning of their greeting. Many professing Christians do not know what the Bible says about the holy days and the importance of keeping them in solemn worship to the Lord and Creator. Sometimes their understanding is based on secular sources instead of the Bible. This book is a biblical, cultural, and historical analysis of the Christian Holy Days. It contains information that all professing Christians should know, understand, and apply to their lives. Major emphasis is given to the Incarnation, Passion Week and the Resurrection. Additional comments are made on the forty post-resurrection days, the Ascension, and Pentecost. In addition, the author is a physician who provides an analysis of the medical aspects of the crucifixion and other relevant medical issues.The author has published in Christian periodicals on the subject of Medicine and the Scriptures and authored two prior books: "The Twelve Generations of the Creation with Biblical Guidelines from Adam to Christ" and "The Mystery Revealed" on Genesis and Revelation, respectively. He has taught Bible studies for more than five decades. In order to better understand the Bible, he has studied Hebrew and Greek.During his medical career, the author has studied internal medicine, geriatrics, and infectious diseases and been credentialed in these fields. He has published in scientific journals in the discipline of infectious diseases. He has held several administrative positions at an executive level. He is a former Dean of a Christian medical school. His medical fellowships include the American College of Physicians, the American College of Physician Executives, and the American College of Healthcare Executives. He has served on several boards of churches and Christian organizations.