从网上下载公历转农历模块并应用于公历转换农历，觉得转换速度极快的，很实用。公历转农历模块的源码作者的确是高手！但最近发现一个小错误，就是在今年（2013年）的6月中旬公历转换成农历时好像要差一天，如今天是6月18日，农历是五月十一，可是用此模块转换出来的农历却是五月初十，差了一天。
源码中作者有具体说明十六进制的农历常量的编写方法，本人根据说明，确定原因是2013的农历四月份被作者设置成大月，而实际是小月，于是动手将2013年的四月设置成小月，即农历常量中的B5500D2改成A5500D2，问题终于得到解决。下面是正确的源码：
Option Explicit
'公历转农历模块
'原创：互联网
'修正：阿勇 2005/1/12
'再修正：揭阳新新科技 2013/6/18
'// 农历数据定义 //
'先以 H2B 函数还原成长度为 18 的字符串，其定义如下：
'前12个字节代表1-12月：1为大月，0为小月；压缩成十六进制(1-3位)
'第13位为闰月的情况，1为大月30天，0为小月29天；(4位)
'第14位为闰月的月份，如果不是闰月为0，否则给出月份(5位)
'最后4位为当年农历新年的公历日期，如0131代表1月31日；当作数值转十六进制(6-7位)
'农历常量(1899~2100，共202年）
Private Const ylData = "AB500D2,4BD0883," _
& "4AE00DB,A5700D0,54D0581,D2600D8,D9500CC,655115D,56A00D5,9AD00CA,55D027A,4AE00D2," _
& "A5B0682,A4D00DA,D2500CE,D25157E,B5500D6,56A00CC,ADA027B,95B00D3,49717C9,49B00DC," _
& "A4B00D0,B4B0580,6A500D8,6D400CD,AB5115C,2B600D5,95700CA,52F027B,49700D2,6560682," _
& "D4A00D9,EA500CE,6A9157E,5AD00D6,2B600CC,86E137C,92E00D3,C8D1783,C9500DB,D4A00D0," _
& "D8A167F,B5500D7,56A00CD,A5B115D,25D00D5,92D00CA,D2B027A,A9500D2,B550781,6CA00D9," _
& "B5500CE,535157F,4DA00D6,A5B00CB,457037C,52B00D4,A9A0883,E9500DA,6AA00D0,AEA0680," _
& "AB500D7,4B600CD,AAE047D,A5700D5,52600CA,F260379,D9500D1,5B50782,56A00D9,96D00CE," _
& "4DD057F,4AD00D7,A4D00CB,D4D047B,D2500D3,D550883,B5400DA,B6A00CF,95A1680,95B00D8," _
& "49B00CD,A97047D,A4B00D5,B270ACA,6A500DC,6D400D1,AF40681,AB600D9,93700CE,4AF057F," _
& "49700D7,64B00CC,74A037B,EA500D2,6B50883,5AC00DB,AB600CF,96D0580,92E00D8,C9600CD," _
& "D95047C,D4A00D4,DA500C9,755027A,56A00D1,ABB0781,25D00DA,92D00CF,CAB057E,A9500D6," _
& "B4A00CB,BAA047B,A5500D2,55D0983,4BA00DB,A5B00D0,5171680,52B00D8,A9300CD,795047D," _
& "6AA00D4,AD500C9,5B5027A,4B600D2,96E0681,A4E00D9,D2600CE,EA6057E,D5300D5,5AA00CB," _
& "76A037B,96D00D3,4AB0B83,4AD00DB,A4D00D0,D0B1680,D2500D7,D5200CC,DD4057C,B5A00D4," _
& "56D00C9,55B027A,49B00D2,A570782,A4B00D9,AA500CE,B25157E,6D200D6,ADA00CA,4B6137B," _
& "93700D3,49F08C9,49700DB,64B00D0,68A1680,EA500D7,6AA00CC,A6C115C,AAE00D4,92E00CA," _
& "D2E0379,C9600D1,D550781,D4A00D9,DA400CD,5D5057E,56A00D6,A6C00CB,55D047B,52D00D3," _
& "A9B0883,A9500DB,B4A00CF,B6A067F,AD500D7,55A00CD,ABA047C,A5A00D4,52B00CA,B27037A," _
& "69300D1,7330781,6AA00D9,AD500CE,4B5157E,4B600D6,A5700CB,54E047C,D1600D2,E960882," _
& "D5200DA,DAA00CF,6AA167F,56D00D7,4AE00CD,A9D047D,A2D00D4,D1500C9,F250279,D5200D1"
Private Const ylMd0 = "初一初二初三初四初五初六初七初八初九初十十一十二十三十四十五" _
& "十六十七十八十九二十廿一廿二廿三廿四廿五廿六廿七廿八廿九三十 "
Private Const ylMn0 = "正二三四五六七八九十冬腊"
Private Const ylTianGan0 = "甲乙丙丁戊已庚辛壬癸"
Private Const ylDiZhi0 = "子丑寅卯辰巳午未申酉戌亥"
Private Const ylShu0 = "鼠牛虎兔龙蛇马羊猴鸡狗猪"
'公历日期转农历
Function GetYLDate(ByVal strDate As String) As String
On Error GoTo aErr
If Not IsDate(strDate) Then Exit Function
Dim setDate As Date, tYear As Integer, tMonth As Integer, tDay As Integer
setDate = CDate(strDate)
tYear = Year(setDate): tMonth = Month(setDate): tDay = Day(setDate)
'如果不是有效有日期，退出
If tYear > 2100 Or tYear < 1900 Then Exit Function
Dim daList() As String * 18, conDate As Date, thisMonths As String
Dim AddYear As Integer, AddMonth As Integer, AddDay As Integer, getDay As Integer
Dim YLyear As String, YLShuXing As String
Dim dd0 As String, mm0 As String, ganzhi(0 To 59) As String * 2
Dim RunYue As Boolean, RunYue1 As Integer, mDays As Integer, i As Integer
'加载2年内的农历数据
ReDim daList(tYear - 1 To tYear)
daList(tYear - 1) = H2B(Mid(ylData, (tYear - 1900) * 8 + 1, 7))
daList(tYear) = H2B(Mid(ylData, (tYear - 1900 + 1) * 8 + 1, 7))
AddYear = tYear
initYL:
AddMonth = CInt(Mid(daList(AddYear), 15, 2))
AddDay = CInt(Mid(daList(AddYear), 17, 2))
conDate = DateSerial(AddYear, AddMonth, AddDay) '农历新年日期
getDay = DateDiff("d", conDate, setDate) + 1 '相差天数
If getDay < 1 Then AddYear = AddYear - 1: GoTo initYL
thisMonths = Left(daList(AddYear), 14)
RunYue1 = Val("&H" & Right(thisMonths, 1)) '闰月月份
If RunYue1 > 0 Then '有闰月
thisMonths = Left(thisMonths, RunYue1) & Mid(thisMonths, 13, 1) & Mid(thisMonths, RunYue1 + 1)
End If
thisMonths = Left(thisMonths, 13)
For i = 1 To 13 '计算天数
mDays = 29 + CInt(Mid(thisMonths, i, 1))
If getDay > mDays Then
getDay = getDay - mDays
Else
If RunYue1 > 0 Then
If i = RunYue1 + 1 Then RunYue = True
If i > RunYue1 Then i = i - 1
End If
AddMonth = i
AddDay = getDay
Exit For
End If
Next
dd0 = Mid(ylMd0, (AddDay - 1) * 2 + 1, 2)
mm0 = Mid(ylMn0, AddMonth, 1) + "月"
For i = 0 To 59
ganzhi(i) = Mid(ylTianGan0, (i Mod 10) + 1, 1) + Mid(ylDiZhi0, (i Mod 12) + 1, 1)
Next i
YLyear = ganzhi((AddYear - 4) Mod 60)
YLShuXing = Mid(ylShu0, ((AddYear - 4) Mod 12) + 1, 1)
If RunYue Then mm0 = "闰" & mm0
GetYLDate = "农历" & YLyear & "(" & YLShuXing & ")年" & mm0 & dd0
aErr:
End Function
'农历转公历日期
'secondMonth 为真，则天示当 tMonth 是闰月时，取第二个月
Function GetDate(ByVal tYear As Integer, tMonth As Integer, tDay As Integer, Optional secondMonth As Boolean = False) As String
On Error GoTo aErr
If tYear > 2100 Or tYear < 1899 Or tMonth > 12 Or tMonth < 1 Or tDay > 30 Or tDay < 1 Then Exit Function
Dim thisMonths As String, ylNewYear As Date, toMonth As Integer
Dim mDays As Integer, RunYue1 As Integer, i As Integer
thisMonths = H2B(Mid(ylData, (tYear - 1899) * 8 + 1, 7))
If tDay > 29 + CInt(Mid(thisMonths, tMonth, 1)) Then Exit Function
ylNewYear = DateSerial(tYear, CInt(Mid(thisMonths, 15, 2)), CInt(Mid(thisMonths, 17, 2))) '农历新年日期
thisMonths = Left(thisMonths, 14)
RunYue1 = Val("&H" & Right(thisMonths, 1)) '闰月月份
toMonth = tMonth - 1
If RunYue1 > 0 Then '有闰月
thisMonths = Left(thisMonths, RunYue1) & Mid(thisMonths, 13, 1) & Mid(thisMonths, RunYue1 + 1)
If tMonth > RunYue1 Or (secondMonth And tMonth = RunYue1) Then toMonth = tMonth
End If
thisMonths = Left(thisMonths, 13)
mDays = 0
For i = 1 To toMonth
mDays = mDays + 29 + CInt(Mid(thisMonths, i, 1))
Next
mDays = mDays + tDay
GetDate = ylNewYear + mDays - 1
aErr:
End Function
'将压缩的阴历字符还原
Private Function H2B(ByVal strHex As String) As String
Dim i As Integer, i1 As Integer, tmpV As String
Const hStr = "0123456789ABCDEF"
Const bStr = "0000000100100011010001010110011110001001101010111100110111101111"
tmpV = UCase(Left(strHex, 3))
'十六进制转二进制
For i = 1 To Len(tmpV)
i1 = InStr(hStr, Mid(tmpV, i, 1))
H2B = H2B & Mid(bStr, (i1 - 1) * 4 + 1, 4)
Next
H2B = H2B & Mid(strHex, 4, 2)
'十六进制转十进制
H2B = H2B & "0" & CStr(Val("&H" & Right(strHex, 2)))
End Function
在此再次感谢原作者的艰辛劳动和无私奉献 ！
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