Since the early 20th century there have been groups which have walled themselves off from the Church concerning changes that were afoot around the world and in the Church. The leading issue, like the tip of a spear that sparked some to set themselves apart in resistance to these changes, was the introduction of a new calendar - often called the Revised Julian Calendar. The Gregorian Calendar, having been rejected over it's altered paschalion, was hybridized to keep the old calendar paschalion. The increasing tensions, including state persecution, lead this resistance to bunker down in it's convictions and lead the division to be solidified. These in resistance are called derisively Old Calendarists. This volume seeks to be sourcebook concerning Old Calendarism. The perspectives included in this volume range from sympathetic to highly critical. It is hoped that this book will promote understanding and dialogue in Christian Love. Lord have mercy!