On Tuesday, November 20th, routers, switches and servers across the Internet reset themselves (or attempted to reset themselves) back to the year 2000.  This sudden change was caused by a reboot of the time server at the US Naval Observatory.  Timing is extremely important to Internet communications, to that end most network devices use a protocol known as Network Time Protocol (NTP) to ensure they are running at the correct time.  NTP operates over UDP 123 and reaches out to a designated device to maintain time sync.  There are volunteer hosts throughout the Internet, such as the one at the US Naval Observatory, that make themselves available for network administrators to sync their servers.  When the reboot of the NTP server at the US Naval Observatory occurred the server set itself back to the year 2000 and when network devices across the Internet checked in for an NTP update the clocks tried adjust themselves back to the year 2000 (many devices will not...