CalendarHelper = {};

CalendarHelper.GetCNDate = function (D) {

    var CalendarData = new Array(100);
    var madd = new Array(12);
    var tgString = "甲乙丙丁戊己庚辛壬癸";
    var dzString = "子醜寅卯辰巳午未申酉戌亥";
    var numString = "一二三四五六七八九十";
    var monString = "正二三四五六七八九十冬臘";
    var weekString = "日一二三四五六";
    var sx = "鼠牛虎兔龍蛇馬羊猴雞狗豬";
    var cYear, cMonth, cDay, TheDate;
    CalendarData = new Array(0xA4B, 0x5164B, 0x6A5, 0x6D4, 0x415B5, 0x2B6, 0x957, 0x2092F, 0x497, 0x60C96, 0xD4A, 0xEA5, 0x50DA9, 0x5AD, 0x2B6, 0x3126E, 0x92E, 0x7192D, 0xC95, 0xD4A, 0x61B4A, 0xB55, 0x56A, 0x4155B, 0x25D, 0x92D, 0x2192B, 0xA95, 0x71695, 0x6CA, 0xB55, 0x50AB5, 0x4DA, 0xA5B, 0x30A57, 0x52B, 0x8152A, 0xE95, 0x6AA, 0x615AA, 0xAB5, 0x4B6, 0x414AE, 0xA57, 0x526, 0x31D26, 0xD95, 0x70B55, 0x56A, 0x96D, 0x5095D, 0x4AD, 0xA4D, 0x41A4D, 0xD25, 0x81AA5, 0xB54, 0xB6A, 0x612DA, 0x95B, 0x49B, 0x41497, 0xA4B, 0xA164B, 0x6A5, 0x6D4, 0x615B4, 0xAB6, 0x957, 0x5092F, 0x497, 0x64B, 0x30D4A, 0xEA5, 0x80D65, 0x5AC, 0xAB6, 0x5126D, 0x92E, 0xC96, 0x41A95, 0xD4A, 0xDA5, 0x20B55, 0x56A, 0x7155B, 0x25D, 0x92D, 0x5192B, 0xA95, 0xB4A, 0x416AA, 0xAD5, 0x90AB5, 0x4BA, 0xA5B, 0x60A57, 0x52B, 0xA93, 0x40E95);
    madd[0] = 0;
    madd[1] = 31;
    madd[2] = 59;
    madd[3] = 90;
    madd[4] = 120;
    madd[5] = 151;
    madd[6] = 181;
    madd[7] = 212;
    madd[8] = 243;
    madd[9] = 273;
    madd[10] = 304;
    madd[11] = 334;
    function GetBit(m, n) {
        return (m >> n) & 1;
    }

    function e2c() {
        TheDate = (arguments.length != 3) ? new Date() : new Date(arguments[0], arguments[1], arguments[2]);
        var total, m, n, k;
        var isEnd = false;
        var tmp = TheDate.getFullYear();
        if (tmp < 1900) {
            tmp += 1900;
        }
        total = (tmp - 1921) * 365 + Math.floor((tmp - 1921) / 4) + madd[TheDate.getMonth()] + TheDate.getDate() - 38;
        if (TheDate.getFullYear() % 4 == 0 && TheDate.getMonth() > 1) {
            total++;
        }
        for (m = 0; ; m++) {
            k = (CalendarData[m] < 0xfff) ? 11 : 12;
            for (n = k; n >= 0; n--) {
                if (total <= 29 + GetBit(CalendarData[m], n)) {
                    isEnd = true;
                    break;
                }
                total = total - 29 - GetBit(CalendarData[m], n);
            }
            if (isEnd) break;
        }
        cYear = 1921 + m;
        cMonth = k - n + 1;
        cDay = total;
        if (k == 12) {
            if (cMonth == Math.floor(CalendarData[m] / 0x10000) + 1) {
                cMonth = 1 - cMonth;
            }
            if (cMonth > Math.floor(CalendarData[m] / 0x10000) + 1) {
                cMonth--;
            }
        }
    }

    function GetcDateString() {
        var tmp = "";
        tmp += tgString.charAt((cYear - 4) % 10);
        tmp += dzString.charAt((cYear - 4) % 12);
        tmp += "(";
        tmp += sx.charAt((cYear - 4) % 12);
        tmp += ")年 ";
        if (cMonth < 1) {
            tmp += "(閏)";
            tmp += monString.charAt(-cMonth - 1);
        } else {
            tmp += monString.charAt(cMonth - 1);
        }
        tmp += "月";
        tmp += (cDay < 11) ? "初" : ((cDay < 20) ? "十" : ((cDay < 30) ? "廿" : "三十"));
        if (cDay % 10 != 0 || cDay == 10) {
            tmp += numString.charAt((cDay - 1) % 10);
        }
        return tmp;
    }

    function GetLunarDay(solarYear, solarMonth, solarDay) {
        //solarYear = solarYear<1900?(1900+solarYear):solarYear;
        if (solarYear < 1921 || solarYear > 2020) {
            return "";
        } else {
            solarMonth = (parseInt(solarMonth) > 0) ? (solarMonth - 1) : 11;
            e2c(solarYear, solarMonth, solarDay);
            return GetcDateString();
        }
    }
    var yy = D.getFullYear();
    var mm = D.getMonth() + 1;
    var dd = D.getDate();
    var ww = D.getDay();
    var ss = parseInt(D.getTime() / 1000);
    if (yy < 100) yy = "19" + yy;
    return GetLunarDay(yy, mm, dd);
};

CalendarHelper.GetAddDay = function (D, v) {
    var LSTR_ndate = D;
    var LSTR_Year = LSTR_ndate.getFullYear();
    var LSTR_Month = LSTR_ndate.getMonth();
    var LSTR_Date = LSTR_ndate.getDate();
    //處理
    var uom = new Date(LSTR_Year, LSTR_Month, LSTR_Date);
    uom.setDate(uom.getDate() + v); //取得系統時間的前一天,重點在這裡,負數是前幾天,正數是後幾天
    return uom;
}

//是否除夕
CalendarHelper.IsLastDayBeforeNewYearOfCN = function (D) {
    var strCurrDay = CalendarHelper.GetCNDate(D);
    var strNextDay = CalendarHelper.GetCNDate(CalendarHelper.GetAddDay(D, 1));
    //alert(strCurrDay+","+strNextDay);
    return strCurrDay.split('年')[0] != strNextDay.split('年')[0];

};

//是否春節
CalendarHelper.IsNewYearOfCN = function (D) {
    var strCurrDay = CalendarHelper.GetCNDate(D);
    var strPrevDay = CalendarHelper.GetCNDate(CalendarHelper.GetAddDay(D, -1));
    //alert(strCurrDay+","+strPrevDay);
    return strCurrDay.split('年')[0] != strPrevDay.split('年')[0];

};

呼叫方法：

var d1 = new Date();
var d2 = new Date(2019, 1, 5); //注：此處相當於2013年2月9號
var d3 = new Date(2013, 1, 10);
var result = GetResult(d1) + GetResult(d2) + GetResult(d3);
alert(result);
function GetResult(D) {
    var y = D.getFullYear();
    var m = D.getMonth() + 1;
    var dd = D.getDate();
    var str = y + "年" + m + "月" + dd + "日";
    var isR = CalendarHelper.IsLastDayBeforeNewYearOfCN(D);
    var isN = CalendarHelper.IsNewYearOfCN(D);
    return "日期:"+str+","+ (isR?"是":"不是") + "除夕" + "," + (isN?"是":"不是") + "春節\n\n" ;
}