LOG TIME in 12c datapump

Data Pump – LOGGING. This command-line parameter can have four values:
NONE: No timestamp information is displayed. (This is the default.)
STATUS: Timestamp messages on status are displayed.
LOGFILE: Same as STATUS, but only displayed for logfile messages.
ALL: A combination of STATUS and LOGFILE.

LOGTIME=[NONE | STATUS | LOGFILE | ALL]

For example

impdp directory=exam_dir dumpfile=ocp.dmp logfile=impdp_ocp.log logtime=all