月齢をActionScriptで計算する //AS3.0

Flash内で月齢[Wikipedia]を扱おうと思い、Wikipediaに出ている公式をFlash内で使えるようにActionScript3.0で書いてみました。 また、計算された月齢をもとに、配列に規定された月名も表示できるようにします。

var LunarAgeArray:Array = [0,2,0,2,2,4,5,6,7,8,9,10];
var LunaName:Array = ["朔（さく）/新月（しんげつ）","既朔（きさく）","三日月（みかづき）","","",""," 上弦（じょうげん）"," 上弦（じょうげん）","","","","","十三夜（じゅうさんや）""小望月（こもちづき）/幾望（きぼう）","満月（まんげつ）/望月（もちづき）","十六夜（いざよい）/既望（きぼう）","立待月（たちまちづき）","居待月（いまちづき）","寝待月（ねまちづき）/臥待月（ふしまちづき）","更待月（ふけまちづき） ","","下弦（かげん）" ,"下弦（かげん）" ,"","","","","","","晦（つごもり）","晦（つごもり）"];
var nowDay = new Date();
var nowYear = nowDay.getFullYear();
var nowMonth = nowDay.getMonth();
var realMonth = nowMonth+1;
var nowDate = nowDay.getDate();
LunarAge = (((nowYear - 11)%19) * 11 + LunarAgeArray[nowMonth] + nowDate)%30;

trace(realMonth +"月"+nowDate+"日の月齢 = "+LunarAge"+" 月名 = "+LunaName[LunarAge-1]);