Why the Microsoft Outlook calendar start from 1601?

Do you know that the Microsoft Outlook calendar starts at a strange year of 1601? A Microsoft video explains why. You will be interested to learn that Windows uses January 1, 1601 as a baseline for file dates and active directory logon dates too. Even the ANSI date format (YYYY-MM-DD), which is used by most computers and operating system, is counted from January 1, 1601. (Thanks Westcoast Walker)