Egypt is the richest source of primary documents for the economy, society and everyday life of the late antique Mediterranean world. Its thousands of papyri provide insight into aspects and topics ignored by ancient authors. This handbook is an indispensable tool in navigating these documents, which use a host of complex systems to date legal transactions. Extensive tables and lists help the reader understand the use of consulates, the indiction cycle, eras, and dates by imperial reigns. Other formal aspects of the documents, including Christian invocations and sworn oaths, are also fully covered.