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/**
* @1900-2100区间内的公历、农历互转
* @charset UTF-8
* @Author Jea杨(JJonline@JJonline.Cn)
* @Time 2014-7-21
* @Time 2016-8-13 Fixed 2033hex、Attribution Annals
* @Time 2016-9-25 Fixed lunar LeapMonth Param Bug
* @Time 2017-7-24 Fixed use getTerm Func Param Error.use solar year,NOT lunar year
* @Version 1.0.3
* @公历转农历calendar.solar2lunar(1987,11,01); //[you can ignore params of prefix 0]
* @农历转公历calendar.lunar2solar(1987,09,10); //[you can ignore params of prefix 0]
*/
type Festival = {
[props: string]: {
title: string
}
}
type SolarData = {
date: string
lunarDate: string
festival: string | null
lunarFestival: string | null
lYear: number
lMonth: number
lDay: number
Animal: string
IMonthCn: string
IDayCn: string
cYear: number
cMonth: number
cDay: number
gzYear: string
gzMonth: string
gzDay: string
isToday: boolean
isLeap: boolean
nWeek: number
ncWeek: string
isTerm: boolean
Term: string | null
astro: string
}
/**
* 农历1900-2100的润大小信息表
* @Array Of Property
* @return Hex
*/
const lunarInfo: number[] = [
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
*/
const solarMonth: number[] = [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
*/
const Gan: string[] = [
'\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
*/
const Zhi: string[] = [
'\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
*/
const Animals: string[] = [
'\u9F20',
'\u725B',
'\u864E',
'\u5154',
'\u9F99',
'\u86C7',
'\u9A6C',
'\u7F8A',
'\u7334',
'\u9E21',
'\u72D7',
'\u732A',
]
/**
* 阳历节日
*/
let festival: 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
*/
let lFestival: Festival = {
'12-30': { title: '除夕' },
'1-1': { title: '春节' },
'1-15': { title: '元宵节' },
'2-2': { title: '龙抬头' },
'5-5': { title: '端午节' },
'7-7': { title: '七夕节' },
'7-15': { title: '中元节' },
'8-15': { title: '中秋节' },
'9-9': { title: '重阳节' },
'10-1': { title: '寒衣节' },
'10-15': { title: '下元节' },
'12-8': { title: '腊八节' },
'12-23': { title: '北方小年' },
'12-24': { title: '南方小年' },
}
/**
* 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
*/
const solarTerm: string[] = [
'\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
*/
const sTermInfo: string[] = [
'9778397bd097c36b0b6fc9274c91aa',
'97b6b97bd19801ec9210c965cc920e',
'97bcf97c3598082c95f8c965cc920f',
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'b027097bd097c36b0b6fc9274c91aa',
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'97bcf97c359801ec95f8c965cc920f',
'97bd0b06bdb0722c965ce1cfcc920f',
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'97bd09801d98082c95f8e1cfcc920f',
'97bd097bd097c36b0b6fc9210c8dc2',
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'97bd09801d98082c95f8e1cfcc920f',
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'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
*/
const nStr1: string[] = [
'\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
*/
const nStr2: string[] = ['\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
*/
const nStr3: string[] = [
'\u6B63',
'\u4E8C',
'\u4E09',
'\u56DB',
'\u4E94',
'\u516D',
'\u4E03',
'\u516B',
'\u4E5D',
'\u5341',
'\u51AC',
'\u814A',
]
/**
* 返回默认定义的阳历节日
*/
export const getFestival = (): Festival => {
return festival
}
/**
* 返回默认定义的内容里节日
*/
export const getLunarFestival = (): Festival => {
return lFestival
}
/**
*
* @param param {Object} 按照festival的格式输入数据设置阳历节日
*/
export const setFestival = (param: Festival = {}) => {
festival = param
}
/**
*
* @param param {Object} 按照lFestival的格式输入数据设置农历节日
*/
export const setLunarFestival = (param: Festival = {}) => {
lFestival = param
}
/**
* 返回农历y年一整年的总天数
* @param y lunar Year
* @return Number
* @eg:var count = calendar.lYearDays(1987) ;//count=387
*/
export const lYearDays = (y: number) => {
let i,
sum = 348
for (i = 0x8000; i > 0x8; i >>= 1) {
sum += lunarInfo[y - 1900] & i ? 1 : 0
}
return sum + 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 y lunar Year
* @return Number (0-12)
* @eg:var leapMonth = calendar.leapMonth(1987) ;//leapMonth=6
*/
export const leapMonth = (y: number) => {
//闰字编码 \u95f0
return 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 y lunar Year
* @return Number (0、29、30)
* @eg:var leapMonthDay = calendar.leapDays(1987) ;//leapMonthDay=29
*/
export const leapDays = (y: number) => {
if (leapMonth(y)) {
return 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 y lunar Year
* @param m lunar Month
* @return Number (-1、29、30)
* @eg:var MonthDay = calendar.monthDays(1987,9) ;//MonthDay=29
*/
export const monthDays = (y: number, m: number) => {
if (m > 12 || m < 1) {
return -1
} //月份参数从1至12参数错误返回-1
return lunarInfo[y - 1900] & (0x10000 >> m) ? 30 : 29
}
/**
* 返回公历(!)y年m月的天数
* @param y solar Year
* @param m solar Month
* @return Number (-1、28、29、30、31)
* @eg:var solarMonthDay = calendar.leapDays(1987) ;//solarMonthDay=30
*/
export const solarDays = (y: number, m: number) => {
if (m > 12 || m < 1) {
return -1
} //若参数错误 返回-1
const 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 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
*/
export const toGanZhiYear = (lYear: number) => {
let ganKey = (lYear - 3) % 10
let 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 Gan[ganKey - 1] + Zhi[zhiKey - 1]
}
/**
* 公历月、日判断所属星座
* @param cMonth [description]
* @param cDay [description]
* @return Cn string
*/
export const toAstro = (cMonth: number, cDay: number) => {
const 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'
const arr = [20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22]
return `${s.slice(cMonth * 2 - (cDay < arr[cMonth - 1] ? 2 : 0), 2)}\u5EA7` //座
}
/**
* 传入offset偏移量返回干支
* @param offset 相对甲子的偏移量
* @return Cn string
*/
export const toGanZhi = (offset: number) => {
return Gan[offset % 10] + Zhi[offset % 12]
}
/**
* 传入公历(!)y年获得该年第n个节气的公历日期
* @param y y公历年(1900-2100)
* @param n n二十四节气中的第几个节气(1~24)从n=1(小寒)算起
* @return day Number
* @eg:var _24 = calendar.getTerm(1987,3) ;//_24=4;意即1987年2月4日立春
*/
export const getTerm = (y: number, n: number) => {
if (y < 1900 || y > 2100 || n < 1 || n > 24) {
return -1
}
const _table = sTermInfo[y - 1900]
const _calcDay = []
for (let index = 0; index < _table.length; index += 5) {
const chunk = Number.parseInt(`0x${_table.slice(index, 5)}`).toString()
_calcDay.push(chunk[0], chunk.slice(1, 2), chunk[3], chunk.slice(4, 2))
}
return Number.parseInt(_calcDay[n - 1])
}
/**
* 传入农历数字月份返回汉语通俗表示法
* @param m lunar month
* @return Cn string
* @eg:var cnMonth = calendar.toChinaMonth(12) ;//cnMonth='腊月'
*/
export const toChinaMonth = (m: number) => {
// 月 => \u6708
if (m > 12 || m < 1) {
return -1
} //若参数错误 返回-1
let s = 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 d lunar day
* @return Cn string
* @eg:var cnDay = calendar.toChinaDay(21) ;//cnMonth='廿一'
*/
export const toChinaDay = (d: number) => {
//日 => \u65e5
let s
switch (d) {
case 10:
s = '\u521D\u5341'
break
case 20:
s = '\u4E8C\u5341'
break
case 30:
s = '\u4E09\u5341'
break
default:
s = nStr2[Math.floor(d / 10)]
s += 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'
*/
export const getAnimal = (y: number) => {
return Animals[(y - 4) % 12]
}
/**
* 传入阳历年月日获得详细的公历、农历object信息 <=>JSON
* !important! 公历参数区间1900.1.31~2100.12.31
* @param yPara solar year
* @param mPara solar month
* @param dPara solar day
* @return JSON object
* @eg:console.log(calendar.solar2lunar(1987,11,01));
*/
export const solar2lunar = (
yPara: string | number,
mPara: string | number,
dPara: string | number
): SolarData | -1 => {
let y = typeof yPara === 'string' ? Number.parseInt(yPara) : yPara
let m = typeof mPara === 'string' ? Number.parseInt(mPara) : mPara
let d = typeof dPara === 'string' ? Number.parseInt(dPara) : dPara
//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
let objDate
if (!y) {
objDate = new Date()
} else {
objDate = new Date(y, m - 1, d)
}
let i,
leap = 0,
temp = 0
//修正ymd参数
y = objDate.getFullYear()
m = objDate.getMonth() + 1
d = objDate.getDate()
let offset =
(Date.UTC(objDate.getFullYear(), objDate.getMonth(), objDate.getDate()) -
Date.UTC(1900, 0, 31)) /
86400000
for (i = 1900; i < 2101 && offset > 0; i++) {
temp = lYearDays(i)
offset -= temp
}
if (offset < 0) {
offset += temp
i--
}
//是否今天
let isTodayObj = new Date(),
isToday = false
if (
isTodayObj.getFullYear() === y &&
isTodayObj.getMonth() + 1 === m &&
isTodayObj.getDate() === d
) {
isToday = true
}
//星期几
let nWeek = objDate.getDay(),
cWeek = 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
const year = i
leap = leapMonth(i) //闰哪个月
let 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 = leapDays(year) //计算农历闰月天数
} else {
temp = 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
const month = i
//农历日
const day = offset + 1
//天干地支处理
const sm = m - 1
const gzY = toGanZhiYear(year)
// 当月的两个节气
// bugfix-2017-7-24 11:03:38 use lunar Year Param `y` Not `year`
const firstNode = getTerm(y, m * 2 - 1) //返回当月「节」为几日开始
const secondNode = getTerm(y, m * 2) //返回当月「节」为几日开始
// 依据12节气修正干支月
let gzM = toGanZhi((y - 1900) * 12 + m + 11)
if (d >= firstNode) {
gzM = toGanZhi((y - 1900) * 12 + m + 12)
}
//传入的日期的节气与否
let isTerm = false
let Term = null
if (firstNode === d) {
isTerm = true
Term = solarTerm[m * 2 - 2]
}
if (secondNode === d) {
isTerm = true
Term = solarTerm[m * 2 - 1]
}
//日柱 当月一日与 1900/1/1 相差天数
const dayCyclical = Date.UTC(y, sm, 1, 0, 0, 0, 0) / 86400000 + 25567 + 10
const gzD = toGanZhi(dayCyclical + d - 1)
//该日期所属的星座
const astro = toAstro(m, d)
const solarDate = `${y}-${m}-${d}`
const lunarDate = `${year}-${month}-${day}`
const festivalDate = `${m}-${d}`
let lunarFestivalDate = `${month}-${day}`
// bugfix https://github.com/jjonline/calendar.js/issues/29
// 农历节日修正农历12月小月则29号除夕大月则30号除夕
// 此处取巧修正当前为农历12月29号时增加一次判断并且把lunarFestivalDate设置为12-30以正确取得除夕
// 天朝农历节日遇闰月过前不过后的原则此处取农历12月天数不考虑闰月
// 农历润12月在本工具支持的200年区间内仅1574年出现
if (month === 12 && day === 29 && monthDays(year, month) === 29) {
lunarFestivalDate = '12-30'
}
return {
date: solarDate,
lunarDate,
festival: festival[festivalDate] ? festival[festivalDate].title : null,
lunarFestival: lFestival[lunarFestivalDate]
? lFestival[lunarFestivalDate].title
: null,
lYear: year,
lMonth: month,
lDay: day,
Animal: getAnimal(year),
IMonthCn: (isLeap ? '\u95F0' : '') + toChinaMonth(month),
IDayCn: toChinaDay(day),
cYear: y,
cMonth: m,
cDay: d,
gzYear: gzY,
gzMonth: gzM,
gzDay: gzD,
isToday,
isLeap,
nWeek,
ncWeek: `\u661F\u671F${cWeek}`,
isTerm,
Term,
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
* !important! 参数区间1900.1.31~2100.12.1
* @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));
*/
export const lunar2solar = (
y: string | number,
m: string | number,
d: string | number,
isLeapMonth: boolean
): SolarData | -1 => {
if (typeof y === 'string') y = Number.parseInt(y)
if (typeof m === 'string') m = Number.parseInt(m)
if (typeof d === 'string') d = Number.parseInt(d)
isLeapMonth = !!isLeapMonth
// const leapOffset = 0
const leapMonthValue = leapMonth(y)
// const leapDay = leapDays(y)
if (isLeapMonth && leapMonthValue !== 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
const day = monthDays(y, m)
let _day = day
//bugFix 2016-9-25
//if month is leap, _day use leapDays method
if (isLeapMonth) {
_day = leapDays(y)
}
if (y < 1900 || y > 2100 || d > _day) {
return -1
} //参数合法性效验
//计算农历的时间差
let offset = 0
let i
for (i = 1900; i < y; i++) {
offset += lYearDays(i)
}
let leap = 0,
isAdd = false
for (i = 1; i < m; i++) {
leap = leapMonth(y)
if (!isAdd) {
//处理闰月
if (leap <= i && leap > 0) {
offset += leapDays(y)
isAdd = true
}
}
offset += 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)
const strap = Date.UTC(1900, 1, 30, 0, 0, 0)
const calObj = new Date((offset + d - 31) * 86400000 + strap)
const cY = calObj.getUTCFullYear()
const cM = calObj.getUTCMonth() + 1
const cD = calObj.getUTCDate()
return solar2lunar(cY, cM, cD)
}