We had the same issue on our NTP server pointing to tick.usno.navy.mil. Set date back to year 2000. Date: Mon, 19 Nov 2012 16:21:55 -0700 From: Van Wolfe <vanwolfe@gmail.com<mailto:vanwolfe@gmail.com>> To: nanog@nanog.org<mailto:nanog@nanog.org> Subject: NTP Issues Today Message-ID: <CAMeggd4cDQwhxQE_JbvpNR-PKKe9LXqA+KzJ97anHFonjwZhdQ@mail.gmail.com<mailto:CAMeggd4cDQwhxQE_JbvpNR-PKKe9LXqA+KzJ97anHFonjwZhdQ@mail.gmail.com>> Content-Type: text/plain; charset=ISO-8859-1 Hello, Did anyone else experience issues with NTP today? We had our server times update to the year 2000 at around 3:30 MT, then revert back to 2012. Thanks, Van