日期值的计算

using System;

namespace CNCalendar
{
public class CNDate
{
private const ushort START_YEAR = 1901;
private const ushort END_YEAR = 2050;
private string[] ConstellationName =
{
"白羊座", "金牛座", "双子座",
"巨蟹座", "狮子座", "处女座",
"天秤座", "天蝎座", "射手座",
"摩羯座", "水瓶座", "双鱼座"};
private string[] LunarHolDayName =
{
"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"};

//数组gLunarDay存入阴历1901年到2100年每年中的月天数信息，
//阴历每月只能是29或30天，一年用12（或13）个二进制位表示，对应位为1表30天，否则为29天
private int[] gLunarMonthDay = {
//测试数据只有1901.1.1 --2050.12.31
0x4ae0, 0xa570, 0x5268, 0xd260, 0xd950, 0x6aa8, 0x56a0, 0x9ad0, 0x4ae8, 0x4ae0, //1910
0xa4d8, 0xa4d0, 0xd250, 0xd548, 0xb550, 0x56a0, 0x96d0, 0x95b0, 0x49b8, 0x49b0, //1920
0xa4b0, 0xb258, 0x6a50, 0x6d40, 0xada8, 0x2b60, 0x9570, 0x4978, 0x4970, 0x64b0, //1930