$ HISTTIMEFORMAT="%F %H:%m:%S " history | head
1 2016-07-03 17:07:35 ENV="~/.bashrc"
2 2016-07-03 17:07:35 sh
3 2016-07-03 17:07:35 export ENV="~/.bashrc"
4 2016-07-03 17:07:35 sh
5 2016-07-03 17:07:35 bash
6 2016-07-03 17:07:35 find . -maxdepth 0 -exec false \; -exec echo YouWillNeverSeeThis \;
7 2016-07-03 17:07:35 man find
8 2016-07-03 17:07:35 ssh badabing
9 2016-07-03 17:07:35 rmdir ha
10 2016-07-03 17:07:35 ls ha