下面是一个关于VB的农历算法
'日期数据定义方法如下
'前12个字节代表1-12月为大月或是小月，1为大月30天，0为小月29天，
'第13位为闰月的情况，1为大月30天，0为小月29天，第14位为闰月的月
'份，如果不是闰月为0，否则给出月份，10、11、12分别用A、B、C来表
'示，即使用16进制。最后4位为当年家农历新年-即农历1月1日所在公历
'的日期，如0131代表1月31日。
'GetYLDate函数使用方式如下tYear为要输入的年，tMonth为月，tDay为
'日期，YLyear是返回值，返加农历的年份，如甲子年，YLShuXing返回
'的是属象，如鼠。IsGetGl是设置是不是通过农历取公历值，如果是，
'前三个返回相应的公历日期，而且返回值是一个公历日期。

Function GetYLDate(tYear As Integer, tMonth As Integer, tDay As Integer, _
                    YLyear As String, YLShuXing As String, _
                    Optional IsGetGl As Boolean) As String

    On Error Resume Next
    Dim daList(1900 To 2011) As String * 18
    Dim conDate As Date, setDate As Date
    Dim AddMonth As Integer, AddDay As Integer, AddYear As Integer, getDay As Integer
    Dim RunYue As Boolean
    If tYear > 2010 Or tYear < 1901 Then Exit Function '如果不是有效有日期，退出
    '1900 to 1909
    daList(1900) = "010010110110180131"
    daList(1901) = "010010101110000219"
    daList(1902) = "101001010111000208"
    daList(1903) = "010100100110150129"
    daList(1904) = "110100100110000216"
    daList(1905) = "110110010101000204"
    daList(1906) = "011010101010140125"
    daList(1907) = "010101101010000213"
    daList(1908) = "100110101101000202"
    daList(1909) = "010010101110120122"
    daList(1910) = "010010101110000210"
    daList(1911) = "101001001101160130"
    daList(1912) = "101001001101000218"
    daList(1913) = "110100100101000206"
    daList(1914) = "110101010100150126"
    daList(1915) = "101101010101000214"
    daList(1916) = "010101101010000204"
    daList(1917) = "100101101101020123"
    daList(1918) = "100101011011000211"
    daList(1919) = "010010011011170201"
    daList(1920) = "010010011011000220"
    daList(1921) = "101001001011000208"
    daList(1922) = "101100100101150128"
    daList(1923) = "011010100101000216"
    daList(1924) = "011011010100000205"
    daList(1925) = "101011011010140124"
    daList(1926) = "001010110110000213"
    daList(1927) = "100101010111000202"
    daList(1928) = "010010010111120123"
    daList(1929) = "010010010111000210"
    daList(1930) = "011001001011060130"
    daList(1931) = "110101001010000217"
    daList(1932) = "111010100101000206"
    daList(1933) = "011011010100150126"
    daList(1934) = "010110101101000214"
    daList(1935) = "001010110110000204"
    daList(1936) = "100100110111030124"
    daList(1937) = "100100101110000211"
    daList(1938) = "110010010110170131"
    daList(1939) = "110010010101000219"
    daList(1940) = "110101001010000208"
    daList(1941) = "110110100101060127"
    daList(1942) = "101101010101000215"
    daList(1943) = "010101101010000205"
    daList(1944) = "101010101101140125"
    daList(1945) = "001001011101000213"
    daList(1946) = "100100101101000202"
    daList(1947) = "110010010101120122"
    daList(1948) = "101010010101000210"
    daList(1949) = "101101001010170129"
    daList(1950) = "011011001010000217"
    daList(1951) = "101101010101000206"
    daList(1952) = "010101011010150127"
    daList(1953) = "010011011010000214"
    daList(1954) = "101001011011000203"
    daList(1955) = "010100101011130124"
    daList(1956) = "010100101011000212"
    daList(1957) = "101010010101080131"
    daList(1958) = "111010010101000218"
    daList(1959) = "011010101010000208"
    daList(1960) = "101011010101060128"
    daList(1961) = "101010110101000215"
    daList(1962) = "010010110110000205"
    daList(1963) = "101001010111040125"
    daList(1964) = "101001010111000213"
    daList(1965) = "010100100110000202"