The memory module date of manufacture.

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    minute                    0..59
  6       7    second                    0..60
              (use 60 for leap-second)

This field will be set to year = 0 if the date of manufacture
is not available.  The hour, minute, and second fields will
always be set to 0.