Install Timestamper plugin.
The Timestamper plugin adds timestamps to the console output of Jenkins jobs. For example:
21:51:15 Started by user anonymous
21:51:15 Building on master
21:51:17 Finished: SUCCESS
/timestamps/
By default, display the elapsed time in seconds with three places after the decimal point.
/timestamps/?time=HH:mm:ss&appendLog
Display the system clock time and append the line from the log.
/timestamps/?elapsed=HH:mm:ss.S&appendLog
Display the elapsed time and append the line from the log.
/timestamps/?time=HH:mm:ss&elapsed=HH:mm:ss.S
Display both the system clock time and the elapsed time.
/timestamps/?currentTime&time=HH:mm:ss
Display the current time on the Jenkins controller.