#!/bin/sh

readarray -t dateparts <<<"$(date "+%0m月%0d日%n%u")"

echo -n "${dateparts[0]}["

case ${dateparts[1]} in
  1)
    echo -n "月"
    ;;
  2)
    echo -n "火"
    ;;
  3)
    echo -n "水"
    ;;
  4)
    echo -n "木"
    ;;
  5)
    echo -n "金"
    ;;
  6)
    echo -n "土"
    ;;
  7)
    echo -n "日"
    ;;
esac

echo "]"