中国年历算法和程式

本文摘自“和荣笔记 - 中国农历二百年算法及年历”

中国公历算法

中国公历算法不是太难，关键是星期值的确定。这里给出了简单算法：

public static int dayofweek(int y, int m, int d) 
{ int w = 1; 
// 公历一年一月一日是星期一，所以起始值为星期日 y = (y-1)%400 + 1; 
// 公历星期值分部 400 年循环一次 int ly = (y-1)/4; 
// 闰年次数 ly = ly - (y-1)/100; ly = ly + (y-1)/400; int ry = y - 1 - ly; 
// 常年次数 w = w + ry; 
// 常年星期值增一 w = w + 2*ly; 
// 闰年星期值增二 w = w + dayofyear(y,m,d); w = (w-1)%7 + 1; return w; } 

中国农历算法

根公历相比，中国农历的算法相当复杂。我在网上找的算法之中，eleworld.com 的算法是最好的一个。这个算法使用了大量的数据来确定农历月份和节气的分部，它仅实用于公历 1901 年到 2100 年之间的 200 年。

中国农历计算程式

跟据 eleworld.com 提供的算法，我写了下面这个程式：
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/**
 * chinesecalendargb.java
 * copyright (c) 1997-2002 by dr. herong yang. http://www.herongyang.com/
 * 中国农历算法 - 实用于公历 1901 年至 2100 年之间的 200 年 
 */
import java.text.*;
import java.util.*;
class chinesecalendargb {
   private int gregorianyear;
   private int gregorianmonth;
   private int gregoriandate;
   private boolean isgregorianleap;
   private int dayofyear;
   private int dayofweek; // 周日一星期的第一天
   private int chineseyear;
   private int chinesemonth; // 负数表示闰月
   private int chinesedate;
   private int sectionalterm;
   private int principleterm;
   private static char[] daysingregorianmonth = 
      {31,28,31,30,31,30,31,31,30,31,30,31};
   private static string[] stemnames =
      {"甲","乙","丙","丁","戊","己","庚","辛","壬","癸"};
   private static string[] branchnames =
      {"子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"};
   private static string[] animalnames =
      {"鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"};
   public static void main(string[] arg) {
      chinesecalendargb c = new chinesecalendargb();
      string cmd = "day";
      int y = 1901;
      int m = 1;
      int d = 1;
      if (arg.length>0) cmd = arg[0];
      if (arg.length>1) y = integer.parseint(arg[1]);
      if (arg.length>2) m = integer.parseint(arg[2]);
      if (arg.length>3) d = integer.parseint(arg[3]);
      c.setgregorian(y,m,d);
      c.computechinesefields();
      c.computesolarterms();
      if (cmd.equalsignorecase("year")) {
         string[] t = c.getyeartable();
         for (int i=0; i      } else if (cmd.equalsignorecase("month")) {
         string[] t = c.getmonthtable();
         for (int i=0; i      } else {
         system.out.println(c.tostring());
      }
   }
   public chinesecalendargb() {
      setgregorian(1901,1,1);
   }
   public void setgregorian(int y, int m, int d) {
      gregorianyear = y;
      gregorianmonth = m;
      gregoriandate = d;
      isgregorianleap = isgregorianleapyear(y);
      dayofyear = dayofyear(y,m,d);
      dayofweek = dayofweek(y,m,d);
      chineseyear = 0;
      chinesemonth = 0;
      chinesedate = 0;
      sectionalterm = 0;
      principleterm = 0;
   }
   public static boolean isgregorianleapyear(int year) {
      boolean isleap = false;
      if (year%4==0) isleap = true;
      if (year%100==0) isleap = false;
      if (year%400==0) isleap = true;
      return isleap;
   }
   public static int daysingregorianmonth(int y, int m) {
      int d = daysingregorianmonth[m-1];
      if (m==2 && isgregorianleapyear(y)) d++; // 公历闰年二月多一天
      return d;
   }
   public static int dayofyear(int y, int m, int d) {
      int c = 0;
      for (int i=1; i         c = c + daysingregorianmonth(y,i);
      }
      c = c + d;
      return c;      
   }
   public static int dayofweek(int y, int m, int d) {
      int w = 1; // 公历一年一月一日是星期一，所以起始值为星期日
      y = (y-1)%400 + 1; // 公历星期值分部 400 年循环一次
      int ly = (y-1)/4; // 闰年次数
      ly = ly - (y-1)/100;
      ly = ly + (y-1)/400;
      int ry = y - 1 - ly; // 常年次数
      w = w + ry; // 常年星期值增一
      w = w + 2*ly; // 闰年星期值增二
      w = w + dayofyear(y,m,d); 
      w = (w-1)%7 + 1;
      return w;
   }
   private static char[] chinesemonths = { 
   // 农历月份大小压缩表，两个字节表示一年。两个字节共十六个二进制位数， 
   // 前四个位数表示闰月月份，后十二个位数表示十二个农历月份的大小。
   0x00,0x04,0xad,0x08,0x5a,0x01,0xd5,0x54,0xb4,0x09,0x64,0x05,0x59,0x45,
   0x95,0x0a,0xa6,0x04,0x55,0x24,0xad,0x08,0x5a,0x62,0xda,0x04,0xb4,0x05,
   0xb4,0x55,0x52,0x0d,0x94,0x0a,0x4a,0x2a,0x56,0x02,0x6d,0x71,0x6d,0x01,
   0xda,0x02,0xd2,0x52,0xa9,0x05,0x49,0x0d,0x2a,0x45,0x2b,0x09,0x56,0x01,
   0xb5,0x20,0x6d,0x01,0x59,0x69,0xd4,0x0a,0xa8,0x05,0xa9,0x56,0xa5,0x04,
   0x2b,0x09,0x9e,0x38,0xb6,0x08,0xec,0x74,0x6c,0x05,0xd4,0x0a,0xe4,0x6a,
   0x52,0x05,0x95,0x0a,0x5a,0x42,0x5b,0x04,0xb6,0x04,0xb4,0x22,0x6a,0x05,
   0x52,0x75,0xc9,0x0a,0x52,0x05,0x35,0x55,0x4d,0x0a,0x5a,0x02,0x5d,0x31,
   0xb5,0x02,0x6a,0x8a,0x68,0x05,0xa9,0x0a,0x8a,0x6a,0x2a,0x05,0x2d,0x09,
   0xaa,0x48,0x5a,0x01,0xb5,0x09,0xb0,0x39,0x64,0x05,0x25,0x75,0x95,0x0a,
   0x96,0x04,0x4d,0x54,0xad,0x04,0xda,0x04,0xd4,0x44,0xb4,0x05,0x54,0x85,
   0x52,0x0d,0x92,0x0a,0x56,0x6a,0x56,0x02,0x6d,0x02,0x6a,0x41,0xda,0x02,
   0xb2,0xa1,0xa9,0x05,0x49,0x0d,0x0a,0x6d,0x2a,0x09,0x56,0x01,0xad,0x50,
   0x6d,0x01,0xd9,0x02,0xd1,0x3a,0xa8,0x05,0x29,0x85,0xa5,0x0c,0x2a,0x09,
   0x96,0x54,0xb6,0x08,0x6c,0x09,0x64,0x45,0xd4,0x0a,0xa4,0x05,0x51,0x25,
   0x95,0x0a,0x2a,0x72,0x5b,0x04,0xb6,0x04,0xac,0x52,0x6a,0x05,0xd2,0x0a,
   0xa2,0x4a,0x4a,0x05,0x55,0x94,0x2d,0x0a,0x5a,0x02,0x75,0x61,0xb5,0x02,
   0x6a,0x03,0x61,0x45,0xa9,0x0a,0x4a,0x05,0x25,0x25,0x2d,0x09,0x9a,0x68,
   0xda,0x08,0xb4,0x09,0xa8,0x59,0x54,0x03,0xa5,0x0a,0x91,0x3a,0x96,0x04,
   0xad,0xb0,0xad,0x04,0xda,0x04,0xf4,0x62,0xb4,0x05,0x54,0x0b,0x44,0x5d,
   0x52,0x0a,0x95,0x04,0x55,0x22,0x6d,0x02,0x5a,0x71,0xda,0x02,0xaa,0x05,
   0xb2,0x55,0x49,0x0b,0x4a,0x0a,0x2d,0x39,0x36,0x01,0x6d,0x80,0x6d,0x01,
   0xd9,0x02,0xe9,0x6a,0xa8,0x05,0x29,0x0b,0x9a,0x4c,0xaa,0x08,0xb6,0x08,
   0xb4,0x38,0x6c,0x09,0x54,0x75,0xd4,0x0a,0xa4,0x05,0x45,0x55,0x95,0x0a,
   0x9a,0x04,0x55,0x44,0xb5,0x04,0x6a,0x82,0x6a,0x05,0xd2,0x0a,0x92,0x6a,
   0x4a,0x05,0x55,0x0a,0x2a,0x4a,0x5a,0x02,0xb5,0x02,0xb2,0x31,0x69,0x03,
   0x31,0x73,0xa9,0x0a,0x4a,0x05,0x2d,0x55,0x2d,0x09,0x5a,0x01,0xd5,0x48,
   0xb4,0x09,0x68,0x89,0x54,0x0b,0xa4,0x0a,0xa5,0x6a,0x95,0x04,0xad,0x08,
   0x6a,0x44,0xda,0x04,0x74,0x05,0xb0,0x25,0x54,0x03
   };
   // 初始日，公历农历对应日期：
   // 公历 1901 年 1 月 1 日，对应农历 4598 年 11 月 11 日
   private static int baseyear = 1901;
   private static int basemonth = 1;
   private static int basedate = 1;
   private static int baseindex = 0;
   private static int basechineseyear = 4598-1;
   private static int basechinesemonth = 11;
   private static int basechinesedate = 11;
   public int computechinesefields() {
      if (gregorianyear<1901 || gregorianyear>2100) return 1;
      int startyear = baseyear;
      int startmonth = basemonth;
      int startdate = basedate;      
      chineseyear = basechineseyear; 
      chinesemonth = basechinesemonth;
      chinesedate = basechinesedate;
      // 第二个对应日，用以提高计算效率
      // 公历 2000 年 1 月 1 日，对应农历 4697 年 11 月 25 日
      if (gregorianyear >= 2000) {
         startyear = baseyear + 99;
         startmonth = 1;
         startdate = 1;
         chineseyear = basechineseyear + 99;
         chinesemonth = 11;
         chinesedate = 25;
      }
      int daysdiff = 0;
      for (int i=startyear; i         daysdiff += 365;
         if (isgregorianleapyear(i)) daysdiff += 1; // leap year
      }
      for (int i=startmonth; i         daysdiff += daysingregorianmonth(gregorianyear,i);
      }
      daysdiff += gregoriandate - startdate;
      
      chinesedate += daysdiff;
      int lastdate = daysinchinesemonth(chineseyear, chinesemonth);
      int nextmonth = nextchinesemonth(chineseyear, chinesemonth);
      while (chinesedate>lastdate) {
         if (math.abs(nextmonth)         chinesemonth = nextmonth;
         chinesedate -= lastdate;
         lastdate = daysinchinesemonth(chineseyear, chinesemonth);
         nextmonth = nextchinesemonth(chineseyear, chinesemonth);
      }
      return 0;
   }
   private static int[] bigleapmonthyears = {
      // 大闰月的闰年年份
        6, 14, 19, 25, 33, 36, 38, 41, 44, 52, 
       55, 79,117,136,147,150,155,158,185,193
      };
   public static int daysinchinesemonth(int y, int m) {
      // 注意：闰月 m < 0
      int index = y - basechineseyear + baseindex;
      int v = 0;
      int l = 0;
      int d = 30;
      if (1<=m && m<=8) {
         v = chinesemonths[2*index];
         l = m - 1;
         if ( ((v>>l)&0x01)==1 ) d = 29;
      } else if (9<=m && m<=12) {
         v = chinesemonths[2*index+1];
         l = m - 9;
         if ( ((v>>l)&0x01)==1 ) d = 29;
      } else {
         v = chinesemonths[2*index+1];
         v = (v>>4)&0x0f;
         if (v!=math.abs(m)) {
            d = 0;
         } else {
            d = 29; 
            for (int i=0; i               if (bigleapmonthyears[i]==index) {
                  d = 30;
                  break;
               }
            }
         }
      }
      return d;
   }
   public static int nextchinesemonth(int y, int m) {
      int n = math.abs(m) + 1;
      if (m>0) {
         int index = y - basechineseyear + baseindex;
         int v = chinesemonths[2*index+1];
         v = (v>>4)&0x0f;
         if (v==m) n = -m;
      }
      if (n==13) n = 1;
      return n;
   }
   private static char[][] sectionaltermmap = {
   {7,6,6,6,6,6,6,6,6,5,6,6,6,5,5,6,6,5,5,5,5,5,5,5,5,4,5,5},  
   {5,4,5,5,5,4,4,5,5,4,4,4,4,4,4,4,4,3,4,4,4,3,3,4,4,3,3,3},  
   {6,6,6,7,6,6,6,6,5,6,6,6,5,5,6,6,5,5,5,6,5,5,5,5,4,5,5,5,5},
   {5,5,6,6,5,5,5,6,5,5,5,5,4,5,5,5,4,4,5,5,4,4,4,5,4,4,4,4,5},
   {6,6,6,7,6,6,6,6,5,6,6,6,5,5,6,6,5,5,5,6,5,5,5,5,4,5,5,5,5},
   {6,6,7,7,6,6,6,7,6,6,6,6,5,6,6,6,5,5,6,6,5,5,5,6,5,5,5,5,4,5,5,5,5},
   {7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,6,6,7,7,6,6,6,7,7},
   {8,8,8,9,8,8,8,8,7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,6,6,7,7,7},
   {8,8,8,9,8,8,8,8,7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,7},
   {9,9,9,9,8,9,9,9,8,8,9,9,8,8,8,9,8,8,8,8,7,8,8,8,7,7,8,8,8},
   {8,8,8,8,7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,6,6,7,7,7},
   {7,8,8,8,7,7,8,8,7,7,7,8,7,7,7,7,6,7,7,7,6,6,7,7,6,6,6,7,7} 
   }; 
   private static char[][] sectionaltermyear = {
   {13,49,85,117,149,185,201,250,250},
   {13,45,81,117,149,185,201,250,250},
   {13,48,84,112,148,184,200,201,250},
   {13,45,76,108,140,172,200,201,250},
   {13,44,72,104,132,168,200,201,250},
   {5 ,33,68,96 ,124,152,188,200,201},
   {29,57,85,120,148,176,200,201,250},
   {13,48,76,104,132,168,196,200,201},
   {25,60,88,120,148,184,200,201,250},
   {16,44,76,108,144,172,200,201,250},
   {28,60,92,124,160,192,200,201,250},
   {17,53,85,124,156,188,200,201,250} 
   };
   private static char[][] principletermmap = {
   {21,21,21,21,21,20,21,21,21,20,20,21,21,20,20,20,20,20,20,20,20,19,
      20,20,20,19,19,20},
   {20,19,19,20,20,19,19,19,19,19,19,19,19,18,19,19,19,18,18,19,19,18,
      18,18,18,18,18,18},
   {21,21,21,22,21,21,21,21,20,21,21,21,20,20,21,21,20,20,20,21,20,20,
      20,20,19,20,20,20,20},
   {20,21,21,21,20,20,21,21,20,20,20,21,20,20,20,20,19,20,20,20,19,19,
      20,20,19,19,19,20,20},
   {21,22,22,22,21,21,22,22,21,21,21,22,21,21,21,21,20,21,21,21,20,20,
      21,21,20,20,20,21,21},
   {22,22,22,22,21,22,22,22,21,21,22,22,21,21,21,22,21,21,21,21,20,21,
      21,21,20,20,21,21,21},
   {23,23,24,24,23,23,23,24,23,23,23,23,22,23,23,23,22,22,23,23,22,22,
      22,23,22,22,22,22,23},
   {23,24,24,24,23,23,24,24,23,23,23,24,23,23,23,23,22,23,23,23,22,22,
      23,23,22,22,22,23,23},
   {23,24,24,24,23,23,24,24,23,23,23,24,23,23,23,23,22,23,23,23,22,22,
      23,23,22,22,22,23,23},
   {24,24,24,24,23,24,24,24,23,23,24,24,23,23,23,24,23,23,23,23,22,23,
      23,23,22,22,23,23,23},
   {23,23,23,23,22,23,23,23,22,22,23,23,22,22,22,23,22,22,22,22,21,22,
      22,22,21,21,22,22,22},
   {22,22,23,23,22,22,22,23,22,22,22,22,21,22,22,22,21,21,22,22,21,21,
      21,22,21,21,21,21,22}
   };
   private static char[][] principletermyear = {
   {13,45,81,113,149,185,201},    
   {21,57,93,125,161,193,201},    
   {21,56,88,120,152,188,200,201},
   {21,49,81,116,144,176,200,201},
   {17,49,77,112,140,168,200,201},
   {28,60,88,116,148,180,200,201},
   {25,53,84,112,144,172,200,201},
   {29,57,89,120,148,180,200,201},
   {17,45,73,108,140,168,200,201},
   {28,60,92,124,160,192,200,201},
   {16,44,80,112,148,180,200,201},
   {17,53,88,120,156,188,200,201} 
   };
   public int computesolarterms() {
      if (gregorianyear<1901 || gregorianyear>2100) return 1;
      sectionalterm = sectionalterm(gregorianyear, gregorianmonth);
      principleterm = principleterm(gregorianyear, gregorianmonth);
      return 0;
   }
   public static int sectionalterm(int y, int m) {
      if (y<1901 || y>2100) return 0;
      int index = 0;
      int ry = y-baseyear+1;
      while (ry>=sectionaltermyear[m-1][index]) index++;
      int term = sectionaltermmap[m-1][4*index+ry%4];
      if ((ry == 121)&&(m == 4)) term = 5;
      if ((ry == 132)&&(m == 4)) term = 5;
      if ((ry == 194)&&(m == 6)) term = 6;
      return term;
   }
   public static int principleterm(int y, int m) {
      if (y<1901 || y>2100) return 0;
      int index = 0;
      int ry = y-baseyear+1;
      while (ry>=principletermyear[m-1][index]) index++;
      int term = principletermmap[m-1][4*index+ry%4];
      if ((ry == 171)&&(m == 3)) term = 21;
      if ((ry == 181)&&(m == 5)) term = 21;
      return term;
   }
   public string tostring() {
      stringbuffer buf = new stringbuffer();
      buf.append("gregorian year: "+gregorianyear+"/n");
      buf.append("gregorian month: "+gregorianmonth+"/n");
      buf.append("gregorian date: "+gregoriandate+"/n");
      buf.append("is leap year: "+isgregorianleap+"/n");
      buf.append("day of year: "+dayofyear+"/n");
      buf.append("day of week: "+dayofweek+"/n");
      buf.append("chinese year: "+chineseyear+"/n");
      buf.append("heavenly stem: "+((chineseyear-1)%10)+"/n");
      buf.append("earthly branch: "+((chineseyear-1)%12)+"/n");
      buf.append("chinese month: "+chinesemonth+"/n");
      buf.append("chinese date: "+chinesedate+"/n");
      buf.append("sectional term: "+sectionalterm+"/n");
      buf.append("principle term: "+principleterm+"/n");
      return buf.tostring();
   }
   public string[] getyeartable() {
      setgregorian(gregorianyear,1,1);
      computechinesefields();
      computesolarterms();
      string[] table = new string[58]; // 6*9 + 4
      table[0] = gettextline(27, "公历年历："+gregorianyear);
      table[1] = gettextline(27, "农历年历："+(chineseyear+1)
         + " ("+stemnames[(chineseyear+1-1)%10]
         + branchnames[(chineseyear+1-1)%12]
         + " - "+animalnames[(chineseyear+1-1)%12]+"年)");
      int ln = 2;
      string blank  = "                                         "
              +"  " + "                                         ";
      string[] mleft = null;
      string[] mright = null;
      for (int i=1; i<=6; i++) {
         table[ln] = blank;
         ln++;
         mleft = getmonthtable();
         mright = getmonthtable();
         for (int j=0; j            string line = mleft[j] + "  " + mright[j];
            table[ln] = line;
            ln++;
         }
      }
      table[ln] = blank;
      ln++;
      table[ln] = gettextline(0,
         "##/## - 公历日期/农历日期，(*)#月 - (闰)农历月第一天");
      ln++;
      return table;
   }
   public static string gettextline(int s, string t) {
      string str  = "                                         "
              +"  " + "                                         ";
      if (t!=null && s         str = str.substring(0,s) + t + str.substring(s+t.length());
      return str;
   }
   private static string[] monthnames =
      {"一","二","三","四","五","六","七","八","九","十","十一","十二"};
   public string[] getmonthtable() {
      setgregorian(gregorianyear,gregorianmonth,1);
      computechinesefields();
      computesolarterms();
      string[] table = new string[8]; 
      string title  = null;
      if (gregorianmonth<11) title  = "                   ";
      else title  = "                 ";
      title = title + monthnames[gregorianmonth-1] + "月"
                    + "                   ";
      string header = "   日    一    二    三    四    五    六 ";
      string blank  = "                                          ";
      table[0] = title;
      table[1] = header;
      int wk = 2;
      string line = "";
      for (int i=1; i         line += "     " + ' ';
      }
      int days = daysingregorianmonth(gregorianyear,gregorianmonth);
      for (int i=gregoriandate; i<=days; i++) {
         line += getdatestring() + ' ';
         rolluponeday();
         if (dayofweek==1) {
            table[wk] = line;
            line = "";
            wk++;
         }
      }
      for (int i=dayofweek; i<=7; i++) {
         line += "     " + ' ';
      }
      table[wk] = line;
      for (int i=wk+1; i         table[i] = blank;
      }
      for (int i=0; i         table[i] = table[i].substring(0,table[i].length()-1);
      }
      
      return table;
   }
     private static string[] chinesemonthnames =
      {"正","二","三","四","五","六","七","八","九","十","冬","腊"};
     private static string[] principletermnames = 
      {"大寒","雨水","春分","谷雨","夏满","夏至","大暑","处暑","秋分", 
       "霜降","小雪","冬至"}; 
     private static string[] sectionaltermnames = 
      {"小寒","立春","惊蛰","清明","立夏","芒种","小暑","立秋","白露", 
       "寒露","立冬","大雪"}; 
   public string getdatestring() {
      string str = "*  /  ";
      string gm = string.valueof(gregorianmonth);
      if (gm.length()==1) gm = ' ' + gm;
      string cm = string.valueof(math.abs(chinesemonth));
      if (cm.length()==1) cm = ' ' + cm;
      string gd = string.valueof(gregoriandate);
      if (gd.length()==1) gd = ' ' + gd;
      string cd = string.valueof(chinesedate);
      if (cd.length()==1) cd = ' ' + cd;
      if (gregoriandate==sectionalterm) {
         str = " "+sectionaltermnames[gregorianmonth-1];
      } else if (gregoriandate==principleterm) {
         str = " "+principletermnames[gregorianmonth-1];
      } else if (chinesedate==1 && chinesemonth>0) {
           str = " "+chinesemonthnames[chinesemonth-1]+"月";
      } else if (chinesedate==1 && chinesemonth<0) {
           str = "*"+chinesemonthnames[-chinesemonth-1]+"月";
      } else {
           str = gd+'/'+cd;
      }
      return str;
   }
   public int rolluponeday() {
      dayofweek = dayofweek%7 + 1;
      dayofyear++;
      gregoriandate++;
      int days = daysingregorianmonth(gregorianyear,gregorianmonth); 
      if (gregoriandate>days) {
         gregoriandate = 1;
         gregorianmonth++;
         if (gregorianmonth>12) {
            gregorianmonth = 1;
            gregorianyear++;
            dayofyear = 1;
            isgregorianleap = isgregorianleapyear(gregorianyear);
         }
         sectionalterm = sectionalterm(gregorianyear,gregorianmonth);
         principleterm = principleterm(gregorianyear,gregorianmonth);
      }
      chinesedate++;
      days = daysinchinesemonth(chineseyear,chinesemonth);
      if (chinesedate>days) {
         chinesedate = 1;
         chinesemonth = nextchinesemonth(chineseyear,chinesemonth);
         if (chinesemonth==1) chineseyear++;
      }
      return 0;
   }
}

[/html]

中国二百年年历 1901 年至 2100 年

我用上面这个程式制作了二百年年历，1901 年至 2100 年，全部收录在这本书中。

年历格式说明：

农历日期列在公历日期后面。
节气用节气名称标明。
农历每月第一天用月份名称标明。
例如，2000 年一月的表达格式如下：
[html]

                   一月                  
   日    一    二    三    四    五    六
                                     1/25
 2/26  3/27  4/28  5/29  立春  腊月  8/ 2
 9/ 3 10/ 4 11/ 5 12/ 6 13/ 7 14/ 8 15/ 9
16/10 17/11 18/12 19/13 20/14  雨水 22/16
23/17 24/18 25/19 26/20 27/21 28/22 29/23
30/24 31/25                              

[/html]

其中：

"1/25" - 表示公历 1 号和农历 25 号。
"立春" - 表示节气。
"腊月" - 表示农历 12 月第一天。

------
有关中国年历算法和程式的详细注解和二百年年历，请参考
“和荣笔记 - 中国农历二百年算法及年历”
- http://www.herongyang.com/year_gb/