Description: The time stamp is the Real Time if supported otherwise sysUpTime.
The convention for this field is as follows:

Real Time: Entry is prefixed with an 'R' character and time is
   formatted using the convention for date-and-time (rfc1903)

   DISPLAY-HINT 'R-2d-1d-1d,1d:1d:1d.1d,1a1d:1d'

    field  octets  contents                  range 
    -----  ------  --------                  ----- 
      1      1-2   year                      0..65536 
      2       3    month                     1..12 
      3       4    day                       1..31 
      4       5    hour                      0..23 
      5       6    minutes                   0..59 
      6       7    seconds                   0..60 
                   (use 60 for leap-second) 
      7       8    deci-seconds              0..9 
      8       9    direction from UTC        '+' / '-' 
      9      10    hours from UTC            0..11 
     10      11    minutes from UTC          0..59 

    For example, Tuesday May 26, 1992 at 1:30:15 PM EDT would be 
    displayed as: 

                R-1992-5-26,13:30:15.0,-4:0 

    Note that if only local time is known, then timezone 
    information (fields 8-10) is not present.

SysUpTime: Entry is prefixed with an 'S' character and time is
   formatted using a portion of that date-and-time convention

   DISPLAY-HINT 'S-1d-1d,1d:1d:1d.1d'

    field  octets  contents                  range 
    -----  ------  --------                  ----- 
      1       3    month                     1..12 
      2       4    day                       1..31 
      3       5    hour                      0..23 
      4       6    minutes                   0..59 
      5       7    seconds                   0..60 
      6       8    deci-seconds              0..9 

    For example,
                     S-5-26,13:30:15.0

    Represents a file that has existed in the system for 5 months, 
    26 days, 13 hours, 30 minutes, 15 seconds exactly.  This value
    will be reset after a reboot of the system.