日本の曜日を求める

by yshrkn

JavaScript

//
function getJapaneseDay(date) {
	var japaneseDay;
	switch (date.getDay()) {
  	case 0:
      japaneseDay = "日曜日";
      break;
  	case 1:
      japaneseDay = "月曜日";
      break;
  	case 2:
      japaneseDay = "火曜日";
      break;
  	case 3:
      japaneseDay = "水曜日";
      break;
  	case 4:
      japaneseDay = "木曜日";
      break;
  	case 5:
      japaneseDay = "金曜日";
      break;
  	case 6:
      japaneseDay = "土曜日";
  }
  return japaneseDay;
}

var today = new Date();
var yesterday = new Date(today - 86400000);

console.log("今日は何曜日？", getJapaneseDay(today));
console.log("昨日は何曜日？", getJapaneseDay(yesterday));