Date value calculation

Using System;

Namespace CNCalendar
{
Public class CNDate
{
Private const ushort start_year= 1901;
Private const ushort END_YEAR = 2050;
Private string [] ConstellationName =
{
"Aries", "Taurus", "Gemini ",
"Cancer", "Leo", "Virgo ",
"Libra", "Scorpio", "Sagittarius ",
"Capricorn", "Aquarius", "Pisces "};
Private string [] LunarHolDayName =
{
"Xiao Han", "Da Han", "Li Chun", "Rain ",
"Stunned", "Spring Equinox", "Qingming", "Gu Yu ",
"Lixia", "Xiaoman", "Mango", "Xia Zhi ",
"Slight Heat", "Great Heat", "Autumn", "Summer Heat ",
"White Dew", "Autumn Equinox", "Cold Dew", "Frost ",
"Winter", "light snow", "heavy snow", "Winter Solstice "};

// The array gLunarDay is stored in the number of days of the month from January 1, 1901 to January 1, 2100,
// The lunar calendar can only be 29 or 30 days a month. 12 (or 13) binary digits are used for a year. The corresponding digit is 1 table and 30 days. Otherwise, the digit is 29 days.
Private int [] gLunarMonthDay = {
// The test data is only 1.1.1 -- 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