Display current time (or --time) using several formats.
| parameter | description | example |
| -t|--time uint32 | time to display | 0 |
| -r|--disp-rfc822|+r|--no-disp-rfc822 | display rfc822 date | This boolean is set. Use + or --no- to unset it. |
| -u|--disp-unixdate|+u|--no-disp-unixdate | display unix date(1) format | |
| -h|--disp-human|+h|--no-disp-human | display human readable time | |
| -s|--disp-sec|+s|--no-disp-sec | display seconds | |
| -n|--disp-secnsec|+n|--no-disp-secnsec | display seconds and nanoseconds |