<!DOCTYPE html><html><head><meta charset="UTF-8"><title>lunar date</title></head><body><script>var lunar = {tg: '甲乙丙丁戊己庚辛壬癸',dz: '子丑寅卯辰巳午未申酉戌亥',number: '一二三四五六七八九十',year: '鼠牛虎兔龙蛇马羊猴鸡狗猪',month: '正二三四五六七八九十冬腊',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]}function getLunarDate(date) {var 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 > ) {return {}}var total, m, n, k, bit, lunarYear, lunarMonth, lunarDay;var isEnd = false;var 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: lunarYear,lunarMonth: lunarMonth,lunarDay: lunarDay,};}function getLunarDateString(lunarDate) {if (!lunarDate.lunarDay) return;var data = {},lunarYear = lunarDate.lunarYear,lunarMonth = lunarDate.lunarMonth,lunarDay = lunarDate.lunarDay;data.tg = lunar.tg.charAt((lunarYear - 4) % 10);data.dz = lunar.dz.charAt((lunarYear - 4) % 12);data.year = lunar.year.charAt((lunarYear - 4) % 12);data.month = lunarMonth < 1 ? '(闰)' + lunar.month.charAt(-lunarMonth - 1) : lunar.month.charAt(lunarMonth - 1);data.day = (lunarDay < 11) ? "初" : ((lunarDay < 20) ? "十" : ((lunarDay < 30) ? "廿" : "三十"));if (lunarDay % 10 != 0 || lunarDay == 10) {data.day += lunar.number.charAt((lunarDay - 1) % 10);}return data;}var lunarDate = getLunarDate('-7-19')var lunarDateString = getLunarDateString(lunarDate)console.log(lunarDate);console.log(lunarDateString);</script></body></html>
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