农历计算方法

/* eslint-disable */
// var calendar={}
export default  {
    /**
     * 农历1900-2100的润大小信息表
     * @Array Of Property
     * @return Hex
     */
    lunarInfo: [
        0x04bd8,
        0x04ae0,
        0x0a570,
        0x054d5,
        0x0d260,
        0x0d950,
        0x16554,
        0x056a0,
        0x09ad0,
        0x055d2, //1900-1909
        0x04ae0,
        0x0a5b6,
        0x0a4d0,
        0x0d250,
        0x1d255,
        0x0b540,
        0x0d6a0,
        0x0ada2,
        0x095b0,
        0x14977, //1910-1919
        0x04970,
        0x0a4b0,
        0x0b4b5,
        0x06a50,
        0x06d40,
        0x1ab54,
        0x02b60,
        0x09570,
        0x052f2,
        0x04970, //1920-1929
        0x06566,
        0x0d4a0,
        0x0ea50,
        0x16a95,
        0x05ad0,
        0x02b60,
        0x186e3,
        0x092e0,
        0x1c8d7,
        0x0c950, //1930-1939
        0x0d4a0,
        0x1d8a6,
        0x0b550,
        0x056a0,
        0x1a5b4,
        0x025d0,
        0x092d0,
        0x0d2b2,
        0x0a950,
        0x0b557, //1940-1949
        0x06ca0,
        0x0b550,
        0x15355,
        0x04da0,
        0x0a5b0,
        0x14573,
        0x052b0,
        0x0a9a8,
        0x0e950,
        0x06aa0, //1950-1959
        0x0aea6,
        0x0ab50,
        0x04b60,
        0x0aae4,
        0x0a570,
        0x05260,
        0x0f263,
        0x0d950,
        0x05b57,
        0x056a0, //1960-1969
        0x096d0,
        0x04dd5,
        0x04ad0,
        0x0a4d0,
        0x0d4d4,
        0x0d250,
        0x0d558,
        0x0b540,
        0x0b6a0,
        0x195a6, //1970-1979
        0x095b0,
        0x049b0,
        0x0a974,
        0x0a4b0,
        0x0b27a,
        0x06a50,
        0x06d40,
        0x0af46,
        0x0ab60,
        0x09570, //1980-1989
        0x04af5,
        0x04970,
        0x064b0,
        0x074a3,
        0x0ea50,
        0x06b58,
        0x05ac0,
        0x0ab60,
        0x096d5,
        0x092e0, //1990-1999
        0x0c960,
        0x0d954,
        0x0d4a0,
        0x0da50,
        0x07552,
        0x056a0,
        0x0abb7,
        0x025d0,
        0x092d0,
        0x0cab5, //2000-2009
        0x0a950,
        0x0b4a0,
        0x0baa4,
        0x0ad50,
        0x055d9,
        0x04ba0,
        0x0a5b0,
        0x15176,
        0x052b0,
        0x0a930, //2010-2019
        0x07954,
        0x06aa0,
        0x0ad50,
        0x05b52,
        0x04b60,
        0x0a6e6,
        0x0a4e0,
        0x0d260,
        0x0ea65,
        0x0d530, //2020-2029
        0x05aa0,
        0x076a3,
        0x096d0,
        0x04afb,
        0x04ad0,
        0x0a4d0,
        0x1d0b6,
        0x0d250,
        0x0d520,
        0x0dd45, //2030-2039
        0x0b5a0,
        0x056d0,
        0x055b2,
        0x049b0,
        0x0a577,
        0x0a4b0,
        0x0aa50,
        0x1b255,
        0x06d20,
        0x0ada0, //2040-2049
        /**Add By JJonline@JJonline.Cn**/
        0x14b63,
        0x09370,
        0x049f8,
        0x04970,
        0x064b0,
        0x168a6,
        0x0ea50,
        0x06b20,
        0x1a6c4,
        0x0aae0, //2050-2059
        0x092e0,
        0x0d2e3,
        0x0c960,
        0x0d557,
        0x0d4a0,
        0x0da50,
        0x05d55,
        0x056a0,
        0x0a6d0,
        0x055d4, //2060-2069
        0x052d0,
        0x0a9b8,
        0x0a950,
        0x0b4a0,
        0x0b6a6,
        0x0ad50,
        0x055a0,
        0x0aba4,
        0x0a5b0,
        0x052b0, //2070-2079
        0x0b273,
        0x06930,
        0x07337,
        0x06aa0,
        0x0ad50,
        0x14b55,
        0x04b60,
        0x0a570,
        0x054e4,
        0x0d160, //2080-2089
        0x0e968,
        0x0d520,
        0x0daa0,
        0x16aa6,
        0x056d0,
        0x04ae0,
        0x0a9d4,
        0x0a2d0,
        0x0d150,
        0x0f252, //2090-2099
        0x0d520,
    ], //2100

    /**
     * 公历每个月份的天数普通表
     * @Array Of Property
     * @return Number
     */
    solarMonth: [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],

    /**
     * 天干地支之天干速查表
     * @Array Of Property trans["甲","乙","丙","丁","戊","己","庚","辛","壬","癸"]
     * @return Cn string
     */
    Gan: ['\u7532', '\u4e59', '\u4e19', '\u4e01', '\u620a', '\u5df1', '\u5e9a', '\u8f9b', '\u58ec', '\u7678'],

    /**
     * 天干地支之地支速查表
     * @Array Of Property
     * @trans["子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"]
     * @return Cn string
     */
    Zhi: [
        '\u5b50',
        '\u4e11',
        '\u5bc5',
        '\u536f',
        '\u8fb0',
        '\u5df3',
        '\u5348',
        '\u672a',
        '\u7533',
        '\u9149',
        '\u620c',
        '\u4ea5',
    ],

    /**
     * 天干地支之地支速查表<=>生肖
     * @Array Of Property
     * @trans["鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"]
     * @return Cn string
     */
    Animals: [
        '\u9f20',
        '\u725b',
        '\u864e',
        '\u5154',
        '\u9f99',
        '\u86c7',
        '\u9a6c',
        '\u7f8a',
        '\u7334',
        '\u9e21',
        '\u72d7',
        '\u732a',
    ],

    /**
     * 阳历节日
     */
    festival: {
        '1-1': { title: '元旦节' },
        '2-14': { title: '情人节' },
        '5-1': { title: '劳动节' },
        '5-4': { title: '青年节' },
        '6-1': { title: '儿童节' },
        '9-10': { title: '教师节' },
        '10-1': { title: '国庆节' },
        '12-25': { title: '圣诞节' },

        '3-8': { title: '妇女节' },
        '3-12': { title: '植树节' },
        '4-1': { title: '愚人节' },
        '5-12': { title: '护士节' },
        '7-1': { title: '建党节' },
        '8-1': { title: '建军节' },
        '12-24': { title: '平安夜' },
    },

    /**
     * 农历节日
     */
    lfestival: {
        '12-30': { title: '除夕' },
        '1-1': { title: '春节' },
        '1-15': { title: '元宵节' },
        '5-5': { title: '端午节' },
        '8-15': { title: '中秋节' },
        '9-9': { title: '重阳节' },
    },

    /**
     * 返回默认定义的阳历节日
     */
    getFestival() {
        return this.festival
    },

    /**
     * 返回默认定义的内容里节日
     */
    getLunarFestival() {
        return this.lfestival
    },

    /**
     *
     * @param {Object} 按照festival的格式输入数据，设置阳历节日
     */
    setFestival(param = {}) {
        this.festival = param
    },

    /**
     *
     * @param {Object} 按照lfestival的格式输入数据，设置农历节日
     */
    setLunarFestival(param = {}) {
        this.lfestival = param
    },

    /**
     * 24节气速查表
     * @Array Of Property
     * @trans["小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至"]
     * @return Cn string
     */
    solarTerm: [
        '\u5c0f\u5bd2',
        '\u5927\u5bd2',
        '\u7acb\u6625',
        '\u96e8\u6c34',
        '\u60ca\u86f0',
        '\u6625\u5206',
        '\u6e05\u660e',
        '\u8c37\u96e8',
        '\u7acb\u590f',
        '\u5c0f\u6ee1',
        '\u8292\u79cd',
        '\u590f\u81f3',
        '\u5c0f\u6691',
        '\u5927\u6691',
        '\u7acb\u79cb',
        '\u5904\u6691',
        '\u767d\u9732',
        '\u79cb\u5206',
        '\u5bd2\u9732',
        '\u971c\u964d',
        '\u7acb\u51ac',
        '\u5c0f\u96ea',
        '\u5927\u96ea',
        '\u51ac\u81f3',
    ],

    /**
     * 1900-2100各年的24节气日期速查表
     * @Array Of Property
     * @return 0x string For splice
     */
    sTermInfo: [
        '9778397bd097c36b0b6fc9274c91aa',
        '97b6b97bd19801ec9210c965cc920e',
        '97bcf97c3598082c95f8c965cc920f',
        '97bd0b06bdb0722c965ce1cfcc920f',
        'b027097bd097c36b0b6fc9274c91aa',
        '97b6b97bd19801ec9210c965cc920e',
        '97bcf97c359801ec95f8c965cc920f',
        '97bd0b06bdb0722c965ce1cfcc920f',
        'b027097bd097c36b0b6fc9274c91aa',
        '97b6b97bd19801ec9210c965cc920e',
        '97bcf97c359801ec95f8c965cc920f',
        '97bd0b06bdb0722c965ce1cfcc920f',
        'b027097bd097c36b0b6fc9274c91aa',
        '9778397bd19801ec9210c965cc920e',
        '97b6b97bd19801ec95f8c965cc920f',
        '97bd09801d98082c95f8e1cfcc920f',
        '97bd097bd097c36b0b6fc9210c8dc2',
        '9778397bd197c36c9210c9274c91aa',
        '97b6b97bd19801ec95f8c965cc920e',
        '97bd09801d98082c95f8e1cfcc920f',
        '97bd097bd097c36b0b6fc9210c8dc2',
        '9778397bd097c36c9210c9274c91aa',
        '97b6b97bd19801ec95f8c965cc920e',
        '97bcf97c3598082c95f8e1cfcc920f',
        '97bd097bd097c36b0b6fc9210c8dc2',
        '9778397bd097c36c9210c9274c91aa',
        '97b6b97bd19801ec9210c965cc920e',
        '97bcf97c3598082c95f8c965cc920f',
        '97bd097bd097c35b0b6fc920fb0722',
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        '97bcf97c359801ec95f8c965cc920f',
        '97bd097bd097c35b0b6fc920fb0722',
        '9778397bd097c36b0b6fc9274c91aa',
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        '97bcf97c359801ec95f8c965cc920f',
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        '7f0e37f1487f595b0b0bb0b6fb0722',
        '7f0e397bd097c35b0b6fc9210c8dc2',
        '9778397bd097c36b0b6fc9274c91aa',
        '97b6b7f0e47f531b0723b0b6fb0721',
        '7f0e27f1487f595b0b0bb0b6fb0722',
        '7f0e397bd097c35b0b6fc920fb0722',
        '9778397bd097c36b0b6fc9274c91aa',
        '97b6b7f0e47f531b0723b0b6fb0721',
        '7f0e27f1487f531b0b0bb0b6fb0722',
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        '7f0e397bd097c35b0b6fc920fb0722',
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        '7f07e7f0e47f531b0723b0b6fb0721',
        '7f0e27f1487f531b0b0bb0b6fb0722',
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        '7f0e27f1487f531b0b0bb0b6fb0722',
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        '7f07e7f0e47f531b0723b0b6fb0721',
        '7f0e27f1487f531b0b0bb0b6fb0722',
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        '7f0e27f0e47f531b0b0bb0b6fb0722',
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        '7f0e27f0e47f531b0723b0b6fb0722',
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        '7ec967f0e37f14998082b0787b06bd',
        '7f07e7f0e47f531b0723b0b6fb0721',
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        '7f07e7f0e47f531b0723b0b6fb0721',
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        '7ec967f0e37f14998082b0787b06bd',
        '7f07e7f0e47f531b0723b0b6fb0721',
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        '7f0e37f0e366aa89801eb072297c35',
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        '7f07e7f0e47f149b0723b0787b0721',
        '7f0e27f1487f531b0b0bb0b6fb0722',
        '7f0e37f0e366aa89801eb072297c35',
        '7ec967f0e37f14998082b0723b06bd',
        '7f07e7f0e47f149b0723b0787b0721',
        '7f0e27f0e47f531b0723b0b6fb0722',
        '7f0e37f0e366aa89801eb072297c35',
        '7ec967f0e37f14998082b0723b06bd',
        '7f07e7f0e37f14998083b0787b0721',
        '7f0e27f0e47f531b0723b0b6fb0722',
        '7f0e37f0e366aa89801eb072297c35',
        '7ec967f0e37f14898082b0723b02d5',
        '7f07e7f0e37f14998082b0787b0721',
        '7f07e7f0e47f531b0723b0b6fb0722',
        '7f0e36665b66aa89801e9808297c35',
        '665f67f0e37f14898082b0723b02d5',
        '7ec967f0e37f14998082b0787b0721',
        '7f07e7f0e47f531b0723b0b6fb0722',
        '7f0e36665b66a449801e9808297c35',
        '665f67f0e37f14898082b0723b02d5',
        '7ec967f0e37f14998082b0787b06bd',
        '7f07e7f0e47f531b0723b0b6fb0721',
        '7f0e36665b66a449801e9808297c35',
        '665f67f0e37f14898082b072297c35',
        '7ec967f0e37f14998082b0787b06bd',
        '7f07e7f0e47f531b0723b0b6fb0721',
        '7f0e26665b66a449801e9808297c35',
        '665f67f0e37f1489801eb072297c35',
        '7ec967f0e37f14998082b0787b06bd',
        '7f07e7f0e47f531b0723b0b6fb0721',
        '7f0e27f1487f531b0b0bb0b6fb0722',
    ],

    /**
     * 数字转中文速查表
     * @Array Of Property
     * @trans ['日','一','二','三','四','五','六','七','八','九','十']
     * @return Cn string
     */
    nStr1: [
        '\u65e5',
        '\u4e00',
        '\u4e8c',
        '\u4e09',
        '\u56db',
        '\u4e94',
        '\u516d',
        '\u4e03',
        '\u516b',
        '\u4e5d',
        '\u5341',
    ],

    /**
     * 日期转农历称呼速查表
     * @Array Of Property
     * @trans ['初','十','廿','卅']
     * @return Cn string
     */
    nStr2: ['\u521d', '\u5341', '\u5eff', '\u5345'],

    /**
     * 月份转农历称呼速查表
     * @Array Of Property
     * @trans ['正','一','二','三','四','五','六','七','八','九','十','冬','腊']
     * @return Cn string
     */
    nStr3: [
        '\u6b63',
        '\u4e8c',
        '\u4e09',
        '\u56db',
        '\u4e94',
        '\u516d',
        '\u4e03',
        '\u516b',
        '\u4e5d',
        '\u5341',
        '\u51ac',
        '\u814a',
    ],

    /**
     * 返回农历y年一整年的总天数
     * @param lunar Year
     * @return Number
     * @eg:var count = calendar.lYearDays(1987) ;//count=387
     */
    lYearDays: function(y) {
        var i,
            sum = 348
        for (i = 0x8000; i > 0x8; i >>= 1) {
            sum += this.lunarInfo[y - 1900] & i ? 1 : 0
        }
        return sum + this.leapDays(y)
    },

    /**
     * 返回农历y年闰月是哪个月；若y年没有闰月 则返回0
     * @param lunar Year
     * @return Number (0-12)
     * @eg:var leapMonth = calendar.leapMonth(1987) ;//leapMonth=6
     */
    leapMonth: function(y) {
        //闰字编码 \u95f0
        return this.lunarInfo[y - 1900] & 0xf
    },

    /**
     * 返回农历y年闰月的天数 若该年没有闰月则返回0
     * @param lunar Year
     * @return Number (0、29、30)
     * @eg:var leapMonthDay = calendar.leapDays(1987) ;//leapMonthDay=29
     */
    leapDays: function(y) {
        if (this.leapMonth(y)) {
            return this.lunarInfo[y - 1900] & 0x10000 ? 30 : 29
        }
        return 0
    },

    /**
     * 返回农历y年m月（非闰月）的总天数，计算m为闰月时的天数请使用leapDays方法
     * @param lunar Year
     * @return Number (-1、29、30)
     * @eg:var MonthDay = calendar.monthDays(1987,9) ;//MonthDay=29
     */
    monthDays: function(y, m) {
        if (m > 12 || m < 1) {
            return -1
        } //月份参数从1至12，参数错误返回-1
        return this.lunarInfo[y - 1900] & (0x10000 >> m) ? 30 : 29
    },

    /**
     * 返回公历(!)y年m月的天数
     * @param solar Year
     * @return Number (-1、28、29、30、31)
     * @eg:var solarMonthDay = calendar.leapDays(1987) ;//solarMonthDay=30
     */
    solarDays: function(y, m) {
        if (m > 12 || m < 1) {
            return -1
        } //若参数错误 返回-1
        var ms = m - 1
        if (ms == 1) {
            //2月份的闰平规律测算后确认返回28或29
            return (y % 4 == 0 && y % 100 != 0) || y % 400 == 0 ? 29 : 28
        } else {
            return this.solarMonth[ms]
        }
    },

    /**
     * 农历年份转换为干支纪年
     * @param  lYear 农历年的年份数
     * @return Cn string
     */
    toGanZhiYear: function(lYear) {
        var ganKey = (lYear - 3) % 10
        var zhiKey = (lYear - 3) % 12
        if (ganKey == 0) ganKey = 10 //如果余数为0则为最后一个天干
        if (zhiKey == 0) zhiKey = 12 //如果余数为0则为最后一个地支
        return this.Gan[ganKey - 1] + this.Zhi[zhiKey - 1]
    },

    /**
     * 公历月、日判断所属星座
     * @param  cMonth [description]
     * @param  cDay [description]
     * @return Cn string
     */
    toAstro: function(cMonth, cDay) {
        var s =
            '\u9b54\u7faf\u6c34\u74f6\u53cc\u9c7c\u767d\u7f8a\u91d1\u725b\u53cc\u5b50\u5de8\u87f9\u72ee\u5b50\u5904\u5973\u5929\u79e4\u5929\u874e\u5c04\u624b\u9b54\u7faf'
        var arr = [20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22]
        return s.substr(cMonth * 2 - (cDay < arr[cMonth - 1] ? 2 : 0), 2) + '\u5ea7' //座
    },

    /**
     * 传入offset偏移量返回干支
     * @param offset 相对甲子的偏移量
     * @return Cn string
     */
    toGanZhi: function(offset) {
        return this.Gan[offset % 10] + this.Zhi[offset % 12]
    },

    /**
     * 传入公历(!)y年获得该年第n个节气的公历日期
     * @param y公历年(1900-2100)；n二十四节气中的第几个节气(1~24)；从n=1(小寒)算起
     * @return day Number
     * @eg:var _24 = calendar.getTerm(1987,3) ;//_24=4;意即1987年2月4日立春
     */
    getTerm: function(y, n) {
        if (y < 1900 || y > 2100) {
            return -1
        }
        if (n < 1 || n > 24) {
            return -1
        }
        var _table = this.sTermInfo[y - 1900]
        var _info = [
            parseInt('0x' + _table.substr(0, 5)).toString(),
            parseInt('0x' + _table.substr(5, 5)).toString(),
            parseInt('0x' + _table.substr(10, 5)).toString(),
            parseInt('0x' + _table.substr(15, 5)).toString(),
            parseInt('0x' + _table.substr(20, 5)).toString(),
            parseInt('0x' + _table.substr(25, 5)).toString(),
        ]
        var _calday = [
            _info[0].substr(0, 1),
            _info[0].substr(1, 2),
            _info[0].substr(3, 1),
            _info[0].substr(4, 2),

            _info[1].substr(0, 1),
            _info[1].substr(1, 2),
            _info[1].substr(3, 1),
            _info[1].substr(4, 2),

            _info[2].substr(0, 1),
            _info[2].substr(1, 2),
            _info[2].substr(3, 1),
            _info[2].substr(4, 2),

            _info[3].substr(0, 1),
            _info[3].substr(1, 2),
            _info[3].substr(3, 1),
            _info[3].substr(4, 2),

            _info[4].substr(0, 1),
            _info[4].substr(1, 2),
            _info[4].substr(3, 1),
            _info[4].substr(4, 2),

            _info[5].substr(0, 1),
            _info[5].substr(1, 2),
            _info[5].substr(3, 1),
            _info[5].substr(4, 2),
        ]
        return parseInt(_calday[n - 1])
    },

    /**
     * 传入农历数字月份返回汉语通俗表示法
     * @param lunar month
     * @return Cn string
     * @eg:var cnMonth = calendar.toChinaMonth(12) ;//cnMonth='腊月'
     */
    toChinaMonth: function(m) {
        // 月 => \u6708
        if (m > 12 || m < 1) {
            return -1
        } //若参数错误 返回-1
        var s = this.nStr3[m - 1]
        s += '\u6708' //加上月字
        return s
    },

    /**
     * 传入农历日期数字返回汉字表示法
     * @param lunar day
     * @return Cn string
     * @eg:var cnDay = calendar.toChinaDay(21) ;//cnMonth='廿一'
     */
    toChinaDay: function(d) {
        //日 => \u65e5
        var s
        switch (d) {
            case 10:
                s = '\u521d\u5341'
                break
            case 20:
                s = '\u4e8c\u5341'
                break
            case 30:
                s = '\u4e09\u5341'
                break
            default:
                s = this.nStr2[Math.floor(d / 10)]
                s += this.nStr1[d % 10]
        }
        return s
    },

    /**
     * 年份转生肖[!仅能大致转换] => 精确划分生肖分界线是“立春”
     * @param y year
     * @return Cn string
     * @eg:var animal = calendar.getAnimal(1987) ;//animal='兔'
     */
    getAnimal: function(y) {
        return this.Animals[(y - 4) % 12]
    },

    /**
     * 传入阳历年月日获得详细的公历、农历object信息 <=>JSON
     * @param y  solar year
     * @param m  solar month
     * @param d  solar day
     * @return JSON object
     * @eg:console.log(calendar.solar2lunar(1987,11,01));
     */
    solar2lunar: function(y, m, d) {
        //参数区间1900.1.31~2100.12.31

        y = parseInt(y)
        m = parseInt(m)
        d = parseInt(d)
        //年份限定、上限
        if (y < 1900 || y > 2100) {
            return -1 // undefined转换为数字变为NaN
        }
        //公历传参最下限
        if (y == 1900 && m == 1 && d < 31) {
            return -1
        }
        //未传参  获得当天
        if (!y) {
            var objDate = new Date()
        } else {
            var objDate = new Date(y, parseInt(m) - 1, d)
        }
        var i,
            leap = 0,
            temp = 0
        //修正ymd参数
        var y = objDate.getFullYear(),
            m = objDate.getMonth() + 1,
            d = objDate.getDate()
        var offset =
            (Date.UTC(objDate.getFullYear(), objDate.getMonth(), objDate.getDate()) - Date.UTC(1900, 0, 31)) / 86400000
        for (i = 1900; i < 2101 && offset > 0; i++) {
            temp = this.lYearDays(i)
            offset -= temp
        }
        if (offset < 0) {
            offset += temp
            i--
        }

        //是否今天
        var isTodayObj = new Date(),
            isToday = false
        if (isTodayObj.getFullYear() == y && isTodayObj.getMonth() + 1 == m && isTodayObj.getDate() == d) {
            isToday = true
        }
        //星期几
        var nWeek = objDate.getDay(),
            cWeek = this.nStr1[nWeek]
        //数字表示周几顺应天朝周一开始的惯例
        if (nWeek == 0) {
            nWeek = 7
        }
        //农历年
        var year = i
        var leap = this.leapMonth(i) //闰哪个月
        var isLeap = false

        //效验闰月
        for (i = 1; i < 13 && offset > 0; i++) {
            //闰月
            if (leap > 0 && i == leap + 1 && isLeap == false) {
                --i
                isLeap = true
                temp = this.leapDays(year) //计算农历闰月天数
            } else {
                temp = this.monthDays(year, i) //计算农历普通月天数
            }
            //解除闰月
            if (isLeap == true && i == leap + 1) {
                isLeap = false
            }
            offset -= temp
        }
        // 闰月导致数组下标重叠取反
        if (offset == 0 && leap > 0 && i == leap + 1) {
            if (isLeap) {
                isLeap = false
            } else {
                isLeap = true
                --i
            }
        }
        if (offset < 0) {
            offset += temp
            --i
        }
        //农历月
        var month = i
        //农历日
        var day = offset + 1
        //天干地支处理
        var sm = m - 1
        var gzY = this.toGanZhiYear(year)

        // 当月的两个节气
        // bugfix-2017-7-24 11:03:38 use lunar Year Param `y` Not `year`
        var firstNode = this.getTerm(y, m * 2 - 1) //返回当月「节」为几日开始
        var secondNode = this.getTerm(y, m * 2) //返回当月「节」为几日开始

        // 依据12节气修正干支月
        var gzM = this.toGanZhi((y - 1900) * 12 + m + 11)
        if (d >= firstNode) {
            gzM = this.toGanZhi((y - 1900) * 12 + m + 12)
        }

        //传入的日期的节气与否
        var isTerm = false
        var Term = null
        if (firstNode == d) {
            isTerm = true
            Term = this.solarTerm[m * 2 - 2]
        }
        if (secondNode == d) {
            isTerm = true
            Term = this.solarTerm[m * 2 - 1]
        }
        //日柱 当月一日与 1900/1/1 相差天数
        var dayCyclical = Date.UTC(y, sm, 1, 0, 0, 0, 0) / 86400000 + 25567 + 10
        var gzD = this.toGanZhi(dayCyclical + d - 1)
        //该日期所属的星座
        var astro = this.toAstro(m, d)

        var solarDate = y + '-' + m + '-' + d
        var lunarDate = year + '-' + month + '-' + day

        var festival = this.festival
        var lfestival = this.lfestival

        var festivalDate = m + '-' + d
        var lunarFestivalDate = month + '-' + day

        return {
            date: solarDate,
            lunarDate: lunarDate,
            festival: festival[festivalDate] ? festival[festivalDate].title : null,
            lunarFestival: lfestival[lunarFestivalDate] ? lfestival[lunarFestivalDate].title : null,
            lYear: year,
            lMonth: month,
            lDay: day,
            Animal: this.getAnimal(year),
            IMonthCn: (isLeap ? '\u95f0' : '') + this.toChinaMonth(month),
            IDayCn: this.toChinaDay(day),
            cYear: y,
            cMonth: m,
            cDay: d,
            gzYear: gzY,
            gzMonth: gzM,
            gzDay: gzD,
            isToday: isToday,
            isLeap: isLeap,
            nWeek: nWeek,
            ncWeek: '\u661f\u671f' + cWeek,
            isTerm: isTerm,
            Term: Term,
            astro: astro,
        }
    },

    /**
     * 传入农历年月日以及传入的月份是否闰月获得详细的公历、农历object信息 <=>JSON
     * @param y  lunar year
     * @param m  lunar month
     * @param d  lunar day
     * @param isLeapMonth  lunar month is leap or not.[如果是农历闰月第四个参数赋值true即可]
     * @return JSON object
     * @eg:console.log(calendar.lunar2solar(1987,9,10));
     */
    lunar2solar: function(y, m, d, isLeapMonth) {
        //参数区间1900.1.31~2100.12.1
        y = parseInt(y)
        m = parseInt(m)
        d = parseInt(d)
        var isLeapMonth = !!isLeapMonth
        var leapOffset = 0
        var leapMonth = this.leapMonth(y)
        var leapDay = this.leapDays(y)
        if (isLeapMonth && leapMonth != m) {
            return -1
        } //传参要求计算该闰月公历 但该年得出的闰月与传参的月份并不同
        if ((y == 2100 && m == 12 && d > 1) || (y == 1900 && m == 1 && d < 31)) {
            return -1
        } //超出了最大极限值
        var day = this.monthDays(y, m)
        var _day = day
        //bugFix 2016-9-25
        //if month is leap, _day use leapDays method
        if (isLeapMonth) {
            _day = this.leapDays(y, m)
        }
        if (y < 1900 || y > 2100 || d > _day) {
            return -1
        } //参数合法性效验

        //计算农历的时间差
        var offset = 0
        for (var i = 1900; i < y; i++) {
            offset += this.lYearDays(i)
        }
        var leap = 0,
            isAdd = false
        for (var i = 1; i < m; i++) {
            leap = this.leapMonth(y)
            if (!isAdd) {
                //处理闰月
                if (leap <= i && leap > 0) {
                    offset += this.leapDays(y)
                    isAdd = true
                }
            }
            offset += this.monthDays(y, i)
        }
        //转换闰月农历 需补充该年闰月的前一个月的时差
        if (isLeapMonth) {
            offset += day
        }
        //1900年农历正月一日的公历时间为1900年1月30日0时0分0秒(该时间也是本农历的最开始起始点)
        var stmap = Date.UTC(1900, 1, 30, 0, 0, 0)
        var calObj = new Date((offset + d - 31) * 86400000 + stmap)
        var cY = calObj.getUTCFullYear()
        var cM = calObj.getUTCMonth() + 1
        var cD = calObj.getUTCDate()

        return this.solar2lunar(cY, cM, cD)
    },
}
/* eslint-disable no-new */