$ errpt |perl -lape '@_=$F[1]=~/(..)/g; substr $_,11,11,""; $_ = ($.==1? "TIMEDATE".(" "x8) : "20".join("-",@_[4,0,1])." ".join(":",@_[2,3]))." ".$_'
TIMEDATE IDENTIFIER T C RESOURCE_NAME DESCRIPTION
TIMEDATE         IDENTIFIER T C RESOURCE_NAME DESCRIPTION
2013-09-30 15:27 982C78BF   T S mir0          DISPLAY ADAPTER CONFIGURATION ERROR
2013-09-25 16:27 BA431EB7   P S SRC           SOFTWARE PROGRAM ERROR


##</code><code>##

errpt | perl -lape '@_=$F[1]=~/(..)/g; substr $_,11,11, ($.==1? "TIMEDATE".(" "x9) : "20".join("-",@_[4,0,1])." ".join(":",@_[2,3])." ")'
IDENTIFIER TIMEDATE         T C RESOURCE_NAME DESCRIPTION
982C78BF   2013-09-30 15:27 T S mir0          DISPLAY ADAPTER CONFIGURATION ERROR
BA431EB7   2013-09-25 16:27 P S SRC           SOFTWARE PROGRAM ERROR


##</code><code>##

IDENTIFIER TIMESTAMP  T C RESOURCE_NAME DESCRIPTION
982C78BF   0930152713 T S mir0          DISPLAY ADAPTER CONFIGURATION ERROR
BA431EB7   0925162713 P S SRC           SOFTWARE PROGRAM ERROR