sh match multiple conditions in one case

Using ;;& in place of ;; causes the shell to test the next pattern list in the statement, if any, and execute any associated list on a successful match. 

function cs() {
  case $1 in
    1)
      echo "Mon";;
    2|3|4|5)
      echo "Tue|Wed|Thu|Fri";;
    5|6|7)
      # ';;&' doesn't work
      echo "Fri|Sat|Sun";;#&
    # 3)
      # echo "Wed";;
    # 2|3)
      # echo "Wed";;
    *)
      echo "Nothing matched";;
  esac
  echo
}
echo "case 1:\t$(cs 1)"
echo "case 3:\t$(cs 3)"
echo "case 5:\t$(cs 5)"
THI0