microfortnight

microfortnight n.  1/1000000 of the fundamental unit of time
   in the Furlong/Firkin/Fortnight system of measurement; 1.2096 sec.
   (A furlong is 1/8th of a mile; a firkin is 1/4th of a barrel; the
   mass unit of the system is taken to be a firkin of water).  The VMS
   operating system has a lot of tuning parameters that you can set
   with the SYSGEN utility, and one of these is TIMEPROMPTWAIT, the
   time the system will wait for an operator to set the correct date
   and time at boot if it realizes that the current value is bogus.
   This time is specified in microfortnights!

   Multiple uses of the millifortnight (about 20 minutes) and
   {nanofortnight} have also been reported.