Microsoft Outlook calendar starts in 1601, but why?

Microsoft is full of oddities and little known answers to mysterious questions. The purpose of this series is to seek out those answers and offer them to you. Please comment with other questions you'd like to get answered!, Laura

Microsoft is full of oddities and little known answers to mysterious questions. The purpose of this series is to seek out those answers and offer them to you. Please comment with other questions you'd like to get answered!, Laura