你指的是阴历吧？阴历这样算，需要一个字典表：

    var table=[

0x04bd8,0x04ae0,0x0a570,0x054d5,0x0d260,0x0d950,0x16554,0x056a0,0x09ad0,

0x055d2,0x04ae0,0x0a5b6,0x0a4d0,0x0d250,0x1d255,0x0b540,0x0d6a0,0x0ada2,

0x095b0,0x14977,0x04970,0x0a4b0,0x0b4b5,0x06a50,0x06d40,0x1ab54,0x02b60,

0x09570,0x052f2,0x04970,0x06566,0x0d4a0,0x0ea50,0x06e95,0x05ad0,0x02b60,

0x186e3,0x092e0,0x1c8d7,0x0c950,0x0d4a0,0x1d8a6,0x0b550,0x056a0,0x1a5b4,

0x025d0,0x092d0,0x0d2b2,0x0a950,0x0b557,0x06ca0,0x0b550,0x15355,0x04da0,

0x0a5d0,0x14573,0x052d0,0x0a9a8,0x0e950,0x06aa0,0x0aea6,0x0ab50,0x04b60,

0x0aae4,0x0a570,0x05260,0x0f263,0x0d950,0x05b57,0x056a0,0x096d0,0x04dd5,

0x04ad0,0x0a4d0,0x0d4d4,0x0d250,0x0d558,0x0b540,0x0b5a0,0x195a6,0x095b0,

0x049b0,0x0a974,0x0a4b0,0x0b27a,0x06a50,0x06d40,0x0af46,0x0ab60,0x09570,

0x04af5,0x04970,0x064b0,0x074a3,0x0ea50,0x06b58,0x055c0,0x0ab60,0x096d5,

0x092e0,0x0c960,0x0d954,0x0d4a0,0x0da50,0x07552,0x056a0,0x0abb7,0x025d0,

0x092d0,0x0cab5,0x0a950,0x0b4a0,0x0baa4,0x0ad50,0x055d9,0x04ba0,0x0a5b0,

0x15176,0x052b0,0x0a930,0x07954,0x06aa0,0x0ad50,0x05b52,0x04b60,0x0a6e6,

0x0a4e0,0x0d260,0x0ea65,0x0d530,0x05aa0,0x076a3,0x096d0,0x04bd7,0x04ad0,

0x0a4d0,0x1d0b6,0x0d250,0x0d520,0x0dd45,0x0b5a0,0x056d0,0x055b2,0x049b0,

0x0a577,0x0a4b0,0x0aa50,0x1b255,0x06d20,0x0ada0

]

return table[year-1900]&0xf

}

lunarLeapMonthOfYear(2004)//2004年阴历闰二月

lunarLeapMonthOfYear(2000)//2000年阴历闰四月

lunarLeapMonthOfYear(2001)//2001年没有闰月

curTime = MaskEdBox1

'星期名

WeekName(0) = " * "

WeekName(1) = "星期日"

WeekName(2) = "星期一"

WeekName(3) = "星期二"

WeekName(4) = "星期三"

WeekName(5) = "星期四"

WeekName(6) = "星期五"

WeekName(7) = "星期六"

'天干名称

TianGan(0) = "甲"

TianGan(1) = "乙"

TianGan(2) = "丙"

TianGan(3) = "丁"

TianGan(4) = "戊"

TianGan(5) = "己"

TianGan(6) = "庚"

TianGan(7) = "辛"

TianGan(8) = "壬"

TianGan(9) = "癸"

'地支名称

DiZhi(0) = "子"

DiZhi(1) = "丑"

DiZhi(2) = "寅"

DiZhi(3) = "卯"

DiZhi(4) = "辰"

DiZhi(5) = "巳"

DiZhi(6) = "午"

DiZhi(7) = "未"

DiZhi(8) = "申"

DiZhi(9) = "酉"

DiZhi(10) = "戌"

DiZhi(11) = "亥"

'属相名称

ShuXiang(0) = "鼠"

ShuXiang(1) = "牛"

ShuXiang(2) = "虎"

ShuXiang(3) = "兔"

ShuXiang(4) = "龙"

ShuXiang(5) = "蛇"

ShuXiang(6) = "马"

ShuXiang(7) = "羊"

ShuXiang(8) = "猴"

ShuXiang(9) = "鸡"

ShuXiang(10) = "狗"

ShuXiang(11) = "猪"

'农历日期名

DayName(0) = "*"

DayName(1) = "初一"

DayName(2) = "初二"

DayName(3) = "初三"

DayName(4) = "初四"

DayName(5) = "初五"

DayName(6) = "初六"

DayName(7) = "初七"

DayName(8) = "初八"

DayName(9) = "初九"

DayName(10) = "初十"

DayName(11) = "十一"

DayName(12) = "十二"

DayName(13) = "十三"

DayName(14) = "十四"

DayName(15) = "十五"

DayName(16) = "十六"

DayName(17) = "十七"

DayName(18) = "十八"

DayName(19) = "十九"

DayName(20) = "二十"

DayName(21) = "廿一"

DayName(22) = "廿二"

DayName(23) = "廿三"

DayName(24) = "廿四"

DayName(25) = "廿五"

DayName(26) = "廿六"

DayName(27) = "廿七"

DayName(28) = "廿八"

DayName(29) = "廿九"

DayName(30) = "三十"

'农历月份名

MonName(0) = "*"

MonName(1) = "正"

MonName(2) = "二"

MonName(3) = "三"

MonName(4) = "四"

MonName(5) = "五"

MonName(6) = "六"

MonName(7) = "七"

MonName(8) = "八"

MonName(9) = "九"

MonName(10) = "十"

MonName(11) = "十一"

MonName(12) = "腊"

'公历每月前面的天数

MonthAdd(0) = 0

MonthAdd(1) = 31

MonthAdd(2) = 59

MonthAdd(3) = 90

MonthAdd(4) = 120

MonthAdd(5) = 151

MonthAdd(6) = 181

MonthAdd(7) = 212

MonthAdd(8) = 243

MonthAdd(9) = 273

MonthAdd(10) = 304

MonthAdd(11) = 334

'农历数据

NongliData(0) = 2635

NongliData(1) = 333387

NongliData(2) = 1701

NongliData(3) = 1748

NongliData(4) = 267701

NongliData(5) = 694

NongliData(6) = 2391

NongliData(7) = 133423

NongliData(8) = 1175

NongliData(9) = 396438

NongliData(10) = 3402

NongliData(11) = 3749

NongliData(12) = 331177

NongliData(13) = 1453

NongliData(14) = 694

NongliData(15) = 201326

NongliData(16) = 2350

NongliData(17) = 465197

NongliData(18) = 3221

NongliData(19) = 3402

NongliData(20) = 400202

NongliData(21) = 2901

NongliData(22) = 1386

NongliData(23) = 267611

NongliData(24) = 605

NongliData(25) = 2349

NongliData(26) = 137515

NongliData(27) = 2709

NongliData(28) = 464533

NongliData(29) = 1738

NongliData(30) = 2901

NongliData(31) = 330421

NongliData(32) = 1242

NongliData(33) = 2651

NongliData(34) = 199255

NongliData(35) = 1323

NongliData(36) = 529706

NongliData(37) = 3733

NongliData(38) = 1706

NongliData(39) = 398762

NongliData(40) = 2741

NongliData(41) = 1206

NongliData(42) = 267438

NongliData(43) = 2647

NongliData(44) = 1318

NongliData(45) = 204070

NongliData(46) = 3477

NongliData(47) = 461653

NongliData(48) = 1386

NongliData(49) = 2413

NongliData(50) = 330077

NongliData(51) = 1197

NongliData(52) = 2637

NongliData(53) = 268877

NongliData(54) = 3365

NongliData(55) = 531109

NongliData(56) = 2900

NongliData(57) = 2922

NongliData(58) = 398042

NongliData(59) = 2395

NongliData(60) = 1179

NongliData(61) = 267415

NongliData(62) = 2635

NongliData(63) = 661067

NongliData(64) = 1701

NongliData(65) = 1748

NongliData(66) = 398772

NongliData(67) = 2742

NongliData(68) = 2391

NongliData(69) = 330031

NongliData(70) = 1175

NongliData(71) = 1611

NongliData(72) = 200010

NongliData(73) = 3749

NongliData(74) = 527717

NongliData(75) = 1452

NongliData(76) = 2742

NongliData(77) = 332397

NongliData(78) = 2350

NongliData(79) = 3222

NongliData(80) = 268949

NongliData(81) = 3402

NongliData(82) = 3493

NongliData(83) = 133973

NongliData(84) = 1386

NongliData(85) = 464219

NongliData(86) = 605

NongliData(87) = 2349

NongliData(88) = 334123

NongliData(89) = 2709

NongliData(90) = 2890

NongliData(91) = 267946

NongliData(92) = 2773

NongliData(93) = 592565

NongliData(94) = 1210

NongliData(95) = 2651

NongliData(96) = 395863

NongliData(97) = 1323

NongliData(98) = 2707

NongliData(99) = 265877

'生成当前公历年、月、日 ==>GongliStr

curYear = Year(curTime)

curMonth = Month(curTime)

curDay = Day(curTime)

GongliStr = curYear &"年"

If curMonth <10 Then

GongliStr = GongliStr &"0" &curMonth &"月"

Else

GongliStr = GongliStr &curMonth &"月"

End If

If curDay <10 Then

GongliStr = GongliStr &"0" &curDay &"日"

Else

GongliStr = GongliStr &curDay &"日"

End If

'生成当前公历星期 ==>WeekdayStr

curWeekday = Weekday(curTime)

WeekdayStr = WeekName(curWeekday)

'计算到初始时间1921年2月8日的天数：1921-2-8(正月初一)

TheDate = (curYear - 1921) * 365 + Int((curYear - 1921) / 4) + curDay + MonthAdd(curMonth - 1) - 38

If curYear Mod 4 = 0 And curMonth >2 Then

TheDate = TheDate + 1

End If

'计算农历天干、地支、月、日

isEnd = 0

m = 0

Do

If NongliData(m) <4095 Then

k = 11

Else

k = 12

End If

n = k

Do

If n <0 Then

Exit Do

End If

'获取NongliData(m)的第n个二进制位的值

bit = NongliData(m)

For i = 1 To n Step 1

bit = Int(bit / 2)

Next

bit = bit Mod 2

If TheDate <= 29 + bit Then

isEnd = 1

Exit Do

End If

TheDate = TheDate - 29 - bit

n = n - 1

Loop

If isEnd = 1 Then

Exit Do

End If

m = m + 1

Loop

curYear = 1921 + m

curMonth = k - n + 1

curDay = TheDate

If k = 12 Then

If curMonth = (Int(NongliData(m) / 65536) + 1) Then

curMonth = 1 - curMonth

ElseIf curMonth >Int(NongliData(m) / 65536) + 1 Then

curMonth = curMonth - 1

End If

End If

'生成农历天干、地支、属相 ==>NongliStr

NongliStr = "农历" &TianGan(((curYear - 4) Mod 60) Mod 10) &DiZhi(((curYear - 4) Mod 60) Mod 12) &"年"

NongliStr = NongliStr &"(" &ShuXiang(((curYear - 4) Mod 60) Mod 12) &")"

'生成农历月、日 ==>NongliDayStr

If curMonth <1 Then

NongliDayStr = "闰" &MonName(-1 * curMonth)

Else

NongliDayStr = MonName(curMonth)

End If

NongliDayStr = NongliDayStr &"月"

NongliDayStr = NongliDayStr &DayName(curDay)

Label2 = NongliStr &NongliDayStr

设：公元年数－1977（或1901）＝4Q＋R

则：阴历日期=14Q+10.6(R+1)+年内日期序数-29.5n

（注:式中Q、R、n均为自然数，R<4）

例：1994年5月7日的阴历日期为：

1994－1977＝17＝4×4＋1

故：Q＝4，R＝1 则：5月7日的阴历日期为：

14×4+10.6(1+1)+(31+28+31+30+7)-29.5n

=204.2- 29.5n

然后用29.5去除204.2得商数6......27.2，6即是n值，余数27即是阴历二十七日。