How to combine text message with system message?
A simple way would be:
printf "The system time is %s.\n" "$(date)"
You could also use string interpolation:
echo "The system time is $(date)."
With GNU date:
date +"The system time is %a %b %d %T %Z %Y"
Straightforwardly:
date +"The system time is %c"
%c
- locale's date and time