微信小程序獲取陰曆

效果圖如下所示

calendar.js

let lunar = {
  tg: '甲乙丙丁戊己庚辛壬癸',
  dz: '子醜寅卯辰巳午未申酉戌亥',
  number: '一二三四五六七八九十',
  year: '鼠牛虎兔龍蛇馬羊猴雞狗豬',
  month: '正二三四五六七八九十冬臘',
  monthadd: [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334],
  calendar: [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],
};
// 獲取陰曆日期
const getLunarDate = (date) => {
  let useDate = new Date();
  let year,
    month,
    day;
  if (!date) {
    date = new Date(), year = date.getFullYear(), month = date.getMonth(), day = date.getDate();
  } else {
    date = date.split('-'), year = parseInt(date[0]), month = date[1] - 1, day = parseInt(date[2]);
  }
  if (year < 1921 || year > 2020) {
    return {};
  }
  let total,
    m,
    n,
    k,
    bit,
    lunarYear,
    lunarMonth,
    lunarDay;
  let isEnd = false;
  let tmp = year;
  if (tmp < 1900) {
    tmp += 1900;
  }
  total = (tmp - 1921) * 365 + Math.floor((tmp - 1921) / 4) + lunar.monthadd[month] + day - 38;
  if (year % 4 == 0 && month > 1) {
    total++;
  }
  for (m = 0; ; m++) {
    k = (lunar.calendar[m] < 0xfff) ? 11 : 12;
    for (n = k; n >= 0; n--) {
      bit = (lunar.calendar[m] >> n) & 1;
      if (total <= 29 + bit) {
        isEnd = true;
        break;
      }
      total = total - 29 - bit;
    }
    if (isEnd) break;
  }
  lunarYear = 1921 + m;
  lunarMonth = k - n + 1;
  lunarDay = total;
  if (k == 12) {
    if (lunarMonth == Math.floor(lunar.calendar[m] / 0x10000) + 1) {
      lunarMonth = 1 - lunarMonth;
    }
    if (lunarMonth > Math.floor(lunar.calendar[m] / 0x10000) + 1) {
      lunarMonth--;
    }
  }

  return {
    lunarYear,
    lunarMonth,
    lunarDay,
  };
};
module.exports = {
  getLunarDate: getLunarDate,//yyyy-MM-DD
}

.js

const calendar = require('../../utils/calendar.js');
Page({
  data: {
  },
  onLoad: function (options) {
  	var timestamp = Date.parse(new Date());
    timestamp = timestamp / 1000;
 	var n = timestamp * 1000;
    var date = new Date(n);
    var Y = date.getFullYear();
    var M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1);
    var D = date.getDate() < 10 ? '0' + date.getDate() : date.getDate();
    var nonglixinxi = calendar.getLunarDate(Y+'-'+M+'-'+D)
    console.log('陰曆:', nonglixinxi)
  },
})

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