我听说，好像农历只能查表，不能用公式算的。
好像是历法设计上有问题。
csdn上的那个算法我贴在下面。
unit Calendar;
interface
uses SysUtils,Windows;
const
START_YEAR=1901;
END_YEAR=2050;
///==> function IsLeapYear(Year: Word): Boolean;
///计算iYear,iMonth,iDay对应是星期几 1年1月1日 --- 65535年12月31日
function WeekDay(iYear,iMonth,iDay:Word):Integer;
///==> function DayOfWeek(Date: TDateTime): Integer;
///计算指定日期的周数，周0为新年开始后第一个星期天开始的周
function WeekNum(const TDT:TDateTime):Word;overload;
function WeekNum(const iYear,iMonth,iDay:Word):Word;overload;
///返回iYear年iMonth月的天数 1年1月 --- 65535年12月
function MonthDays(iYear,iMonth:Word):Word;
///返回阴历iLunarYer年阴历iLunarMonth月的天数，如果iLunarMonth为闰月，
///高字为第二个iLunarMonth月的天数，否则高字为0
///1901年1月---2050年12月
function LunarMonthDays(iLunarYear,iLunarMonth:Word):Longword;
///返回阴历iLunarYear年的总天数
///1901年1月---2050年12月
function LunarYearDays(iLunarYear:Word):Word;
///返回阴历iLunarYear年的闰月月份，如没有返回0
///1901年1月---2050年12月
function GetLeapMonth(iLunarYear:Word):Word;
///把iYear年格式化成天干记年法表示的字符串
procedure FormatLunarYear(iYear:Word;var pBuffer:string);overload;
function FormatLunarYear(iYear:Word):string;overload;
///把iMonth格式化成中文字符串
procedure FormatMonth(iMonth:Word;var
pBuffer:string;bLunar:Boolean=True);overload;
function FormatMonth(iMonth:Word;bLunar:Boolean=True):string;overload;
///把iDay格式化成中文字符串
procedure FormatLunarDay(iDay:Word;var pBuffer:string);overload;
function FormatLunarDay(iDay:Word):string;overload;
///计算公历两个日期间相差的天数 1年1月1日 --- 65535年12月31日
function
CalcDateDiff(iEndYear,iEndMonth,iEndDay:Word;iStartYear:Word=START_YEAR;iSta
rtMonth:Word=1;iStartDay:Word=1):Longword;overload;
function CalcDateDiff(EndDate,StartDate:TDateTime):Longword;overload;
///计算公历iYear年iMonth月iDay日对应的阴历日期,返回对应的阴历节气 0-24
///1901年1月1日---2050年12月31日
function GetLunarDate(iYear,iMonth,iDay:Word;var
iLunarYear,iLunarMonth,iLunarDay:Word):Word;overload;
procedure GetLunarDate(InDate:TDateTime;var
iLunarYear,iLunarMonth,iLunarDay:Word);overload;
function GetLunarHolDay(InDate:TDateTime):string;overload;
function GetLunarHolDay(iYear,iMonth,iDay:Word):string;overload;
///private function--------------------------------------
///计算从1901年1月1日过iSpanDays天后的阴历日期
procedure l_CalcLunarDate(var iYear,iMonth,iDay:Word;iSpanDays:Longword);
///计算公历iYear年iMonth月iDay日对应的节气 0-24，0表不是节气
function l_GetLunarHolDay(iYear,iMonth,iDay:Word):Word;
implementation
var
///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
gLunarMonthDay:array[0..149] of Word=(
///测试数据只有1901.1.1 --2050.12.31
$4ae0, $a570, $5268, $d260, $d950, $6aa8, $56a0, $9ad0, $4ae8, $4ae0,
///1910
$a4d8, $a4d0, $d250, $d548, $b550, $56a0, $96d0, $95b0, $49b8, $49b0,
///1920
$a4b0, $b258, $6a50, $6d40, $ada8, $2b60, $9570, $4978, $4970, $64b0,
///1930
$d4a0, $ea50, $6d48, $5ad0, $2b60, $9370, $92e0, $c968, $c950, $d4a0,
///1940
$da50, $b550, $56a0, $aad8, $25d0, $92d0, $c958, $a950, $b4a8, $6ca0,
///1950
$b550, $55a8, $4da0, $a5b0, $52b8, $52b0, $a950, $e950, $6aa0, $ad50,
///1960
$ab50, $4b60, $a570, $a570, $5260, $e930, $d950, $5aa8, $56a0, $96d0,
///1970
$4ae8, $4ad0, $a4d0, $d268, $d250, $d528, $b540, $b6a0, $96d0, $95b0,
///1980
$49b0, $a4b8, $a4b0, $b258, $6a50, $6d40, $ada0, $ab60, $9370, $4978,
///1990
$4970, $64b0, $6a50, $ea50, $6b28, $5ac0, $ab60, $9368, $92e0, $c960,
///2000
$d4a8, $d4a0, $da50, $5aa8, $56a0, $aad8, $25d0, $92d0, $c958, $a950,
///2010
$b4a0, $b550, $b550, $55a8, $4ba0, $a5b0, $52b8, $52b0, $a930, $74a8,
///2020
$6aa0, $ad50, $4da8, $4b60, $9570, $a4e0, $d260, $e930, $d530, $5aa0,
///2030
$6b50, $96d0, $4ae8, $4ad0, $a4d0, $d258, $d250, $d520, $daa0, $b5a0,
///2040
$56d0, $4ad8, $49b0, $a4b8, $a4b0, $aa50, $b528, $6d20, $ada0, $55b0);
///2050
///数组gLanarMonth存放阴历1901年到2050年闰月的月份，如没有则为0，每字节存两年
gLunarMonth:array[0..74] of Byte=(
$00, $50, $04, $00, $20, ///1910
$60, $05, $00, $20, $70, ///1920
$05, $00, $40, $02, $06, ///1930
$00, $50, $03, $07, $00, ///1940
$60, $04, $00, $20, $70, ///1950
$05, $00, $30, $80, $06, ///1960
$00, $40, $03, $07, $00, ///1970
$50, $04, $08, $00, $60, ///1980
$04, $0a, $00, $60, $05, ///1990
$00, $30, $80, $05, $00, ///2000
$40, $02, $07, $00, $50, ///2010
$04, $09, $00, $60, $04, ///2020
$00, $20, $60, $05, $00, ///2030
$30, $b0, $06, $00, $50, ///2040
$02, $07, $00, $50, $03); ///2050
///数组gLanarHoliDay存放每年的二十四节气对应的阳历日期
///每年的二十四节气对应的阳历日期几乎固定，平均分布于十二个月中
/////1月 2月 3月 4月 5月 6月
///小寒 大寒 立春 雨水 惊蛰 春分 清明 谷雨 立夏 小满 芒种 夏至
/////7月 8月 9月 10月 11月 12月
///小暑 大暑 立秋 处暑 白露 秋分 寒露 霜降 立冬 小雪 大雪 冬至
{***************************************************************************
******
节气无任何确定规律,所以只好存表,要节省空间,所以....
****************************************************************************
******}
///数据格式说明:
///如1901年的节气为
////1月 2月 3月 4月 5月 6月 7月 8月 9月 10月 11月
12月
///6, 21, 4, 19, 6, 21, 5, 21, 6,22, 6,22, 8, 23, 8, 24, 8, 24, 8, 24, 8,
23, 8, 22
///9, 6, 11,4, 9, 6, 10,6, 9,7, 9,7, 7, 8, 7, 9, 7, 9, 7, 9, 7,
8, 7, 15
///上面第一行数据为每月节气对应日期,15减去每月第一个节气,每月第二个节气减去15
得第二行
///这样每月两个节气对应数据都小于16,每月用一个字节存放,高位存放第一个节气数
据,低位存放
///第二个节气的数据,可得下表
gLunarHolDay:array[0..1799] of Byte=(
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1901
$96, $A4, $96, $96, $97, $87, $79, $79, $79, $69, $78, $78, ///1902
$96, $A5, $87, $96, $87, $87, $79, $69, $69, $69, $78, $78, ///1903
$86, $A5, $96, $A5, $96, $97, $88, $78, $78, $79, $78, $87, ///1904
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1905
$96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78, ///1906
$96, $A5, $87, $96, $87, $87, $79, $69, $69, $69, $78, $78, ///1907
$86, $A5, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1908
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1909
$96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78, ///1910
$96, $A5, $87, $96, $87, $87, $79, $69, $69, $69, $78, $78, ///1911
$86, $A5, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1912
$95, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1913
$96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $78, ///1914
$96, $A5, $97, $96, $97, $87, $79, $79, $69, $69, $78, $78, ///1915
$96, $A5, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1916
$95, $B4, $96, $A6, $96, $97, $78, $79, $78, $69, $78, $87, ///1917
$96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $77, ///1918
$96, $A5, $97, $96, $97, $87, $79, $79, $69, $69, $78, $78, ///1919
$96, $A5, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1920
$95, $B4, $96, $A5, $96, $97, $78, $79, $78, $69, $78, $87, ///1921
$96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $77, ///1922
$96, $A4, $96, $96, $97, $87, $79, $79, $69, $69, $78, $78, ///1923
$96, $A5, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1924
$95, $B4, $96, $A5, $96, $97, $78, $79, $78, $69, $78, $87, ///1925
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1926
$96, $A4, $96, $96, $97, $87, $79, $79, $79, $69, $78, $78, ///1927
$96, $A5, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1928
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1929
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1930
$96, $A4, $96, $96, $97, $87, $79, $79, $79, $69, $78, $78, ///1931
$96, $A5, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1932
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1933
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1934
$96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78, ///1935
$96, $A5, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1936
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1937
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1938
$96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78, ///1939
$96, $A5, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1940
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1941
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1942
$96, $A4, $96, $96, $97, $97, $79, $79, $79, $69, $78, $78, ///1943
$96, $A5, $96, $A5, $A6, $96, $88, $78, $78, $78, $87, $87, ///1944
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1945
$95, $B4, $96, $A6, $97, $97, $78, $79, $78, $69, $78, $77, ///1946
$96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $78, ///1947
$96, $A5, $A6, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///1948
$A5, $B4, $96, $A5, $96, $97, $88, $79, $78, $79, $77, $87, ///1949
$95, $B4, $96, $A5, $96, $97, $78, $79, $78, $69, $78, $77, ///1950
$96, $B4, $96, $A6, $97, $97, $79, $79, $79, $69, $78, $78, ///1951
$96, $A5, $A6, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///1952
$A5, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1953
$95, $B4, $96, $A5, $96, $97, $78, $79, $78, $68, $78, $87, ///1954
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1955
$96, $A5, $A5, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///1956
$A5, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1957
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1958
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1959
$96, $A4, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87, ///1960
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1961
$96, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1962
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1963
$96, $A4, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87, ///1964
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1965
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1966
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1967
$96, $A4, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///1968
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1969
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1970
$96, $B4, $96, $A6, $97, $97, $78, $79, $79, $69, $78, $77, ///1971
$96, $A4, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///1972
$A5, $B5, $96, $A5, $A6, $96, $88, $78, $78, $78, $87, $87, ///1973
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1974
$96, $B4, $96, $A6, $97, $97, $78, $79, $78, $69, $78, $77, ///1975
$96, $A4, $A5, $B5, $A6, $A6, $88, $89, $88, $78, $87, $87, ///1976
$A5, $B4, $96, $A5, $96, $96, $88, $88, $78, $78, $87, $87, ///1977
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $78, $87, ///1978
$96, $B4, $96, $A6, $96, $97, $78, $79, $78, $69, $78, $77, ///1979
$96, $A4, $A5, $B5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///1980
$A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $77, $87, ///1981
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1982
$95, $B4, $96, $A5, $96, $97, $78, $79, $78, $69, $78, $77, ///1983
$96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $87, ///1984
$A5, $B4, $A6, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///1985
$A5, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///1986
$95, $B4, $96, $A5, $96, $97, $88, $79, $78, $69, $78, $87, ///1987
$96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///1988
$A5, $B4, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87, ///1989
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $79, $77, $87, ///1990
$95, $B4, $96, $A5, $86, $97, $88, $78, $78, $69, $78, $87, ///1991
$96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///1992
$A5, $B3, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87, ///1993
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1994
$95, $B4, $96, $A5, $96, $97, $88, $76, $78, $69, $78, $87, ///1995
$96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///1996
$A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///1997
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///1998
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///1999
$96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///2000
$A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///2001
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///2002
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///2003
$96, $B4, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///2004
$A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///2005
$A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///2006
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $69, $78, $87, ///2007
$96, $B4, $A5, $B5, $A6, $A6, $87, $88, $87, $78, $87, $86, ///2008
$A5, $B3, $A5, $B5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///2009
$A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///2010
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $78, $87, ///2011
$96, $B4, $A5, $B5, $A5, $A6, $87, $88, $87, $78, $87, $86, ///2012
$A5, $B3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $87, ///2013
$A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///2014
$95, $B4, $96, $A5, $96, $97, $88, $78, $78, $79, $77, $87, ///2015
$95, $B4, $A5, $B4, $A5, $A6, $87, $88, $87, $78, $87, $86, ///2016
$A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $87, ///2017
$A5, $B4, $A6, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///2018
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $79, $77, $87, ///2019
$95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $86, ///2020
$A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///2021
$A5, $B4, $A5, $A5, $A6, $96, $88, $88, $88, $78, $87, $87, ///2022
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $79, $77, $87, ///2023
$95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96, ///2024
$A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///2025
$A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///2026
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///2027
$95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96, ///2028
$A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///2029
$A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///2030
$A5, $B4, $96, $A5, $96, $96, $88, $78, $78, $78, $87, $87, ///2031
$95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96, ///2032
$A5, $C3, $A5, $B5, $A6, $A6, $88, $88, $88, $78, $87, $86, ///2033
$A5, $B3, $A5, $A5, $A6, $A6, $88, $78, $88, $78, $87, $87, ///2034
$A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///2035
$95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96, ///2036
$A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $86, ///2037
$A5, $B3, $A5, $A5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///2038
$A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///2039
$95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $78, $87, $96, ///2040
$A5, $C3, $A5, $B5, $A5, $A6, $87, $88, $87, $78, $87, $86, ///2041
$A5, $B3, $A5, $B5, $A6, $A6, $88, $88, $88, $78, $87, $87, ///2042
$A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///2043
$95, $B4, $A5, $B4, $A5, $A6, $97, $87, $87, $88, $87, $96, ///2044
$A5, $C3, $A5, $B4, $A5, $A6, $87, $88, $87, $78, $87, $86, ///2045
$A5, $B3, $A5, $B5, $A6, $A6, $87, $88, $88, $78, $87, $87, ///2046
$A5, $B4, $96, $A5, $A6, $96, $88, $88, $78, $78, $87, $87, ///2047
$95, $B4, $A5, $B4, $A5, $A5, $97, $87, $87, $88, $86, $96, ///2048
$A4, $C3, $A5, $A5, $A5, $A6, $97, $87, $87, $78, $87, $86, ///2049
$A5, $C3, $A5, $B5, $A6, $A6, $87, $88, $78, $78, $87, $87); ///2050
function WeekDay(iYear,iMonth,iDay:Word):Integer;
begin
Result:=DayOfWeek(EncodeDate(iYear,iMonth,iDay));
end;
function WeekNum(const TDT:TDateTime):Word;
var
Y,M,D:Word;
dtTmp:TDateTime;
begin
DecodeDate(TDT,Y,M,D);
dtTmp:=EnCodeDate(Y,1,1);
Result:=(Trunc(TDT-dtTmp)+(DayOfWeek(dtTmp)-1)) div 7;
if Result=0 then
Result:=51
else
Result:=Result-1;
end;
function WeekNum(const iYear,iMonth,iDay:Word):Word;
begin
Result:=WeekNum(EncodeDate(iYear,iMonth,iDay));
end;
function MonthDays(iYear,iMonth:Word):Word;
begin
case iMonth of
1,3,5,7,8,10,12: Result:=31;
4,6,9,11: Result:=30;
2://如果是闰年
if IsLeapYear(iYear) then
Result:=29
else
Result:=28
else
Result:=0;
end;
end;
function GetLeapMonth(iLunarYear:Word):Word;
var
Flag:Byte;
begin
Flag:=gLunarMonth[(iLunarYear-START_YEAR) div 2];
if (iLunarYear-START_YEAR) mod 2=0 then
Result:=Flag shr 4
else
Result:=Flag and $0F;
end;
function LunarMonthDays(iLunarYear,iLunarMonth:Word):Longword;
var
Height,Low:Word;
iBit:Integer;
begin
if iLunarYear<START_YEAR then
begin
Result:=30;
Exit;
end;
Height:=0;
Low:=29;
iBit:=16-iLunarMonth;
if (iLunarMonth>GetLeapMonth(iLunarYear)) and (GetLeapMonth(iLunarYear)>0)
then
Dec(iBit);
if (gLunarMonthDay[iLunarYear-START_YEAR] and (1 shl iBit))>0 then
Inc(Low);
if iLunarMonth=GetLeapMonth(iLunarYear) then
if (gLunarMonthDay[iLunarYear-START_YEAR] and (1 shl (iBit-1)))>0 then
Height:=30
else
Height:=29;
Result:=MakeLong(Low,Height);
end;
function LunarYearDays(iLunarYear:Word):Word;
var
Days,i:Word;
tmp:Longword;
begin
Days:=0;
for i:=1 to 12 do
begin
tmp:=LunarMonthDays(iLunarYear,i);
Days:=Days+HiWord(tmp);
Days:=Days+LoWord(tmp);
end;
Result:=Days;
end;
procedure FormatLunarYear(iYear:Word;var pBuffer:string);
var
szText1,szText2,szText3:string;
begin
szText1:='甲乙丙丁戊己庚辛壬癸';
szText2:='子丑寅卯辰巳午未申酉戌亥';
szText3:='鼠牛虎免龙蛇马羊猴鸡狗猪';
pBuffer:=Copy(szText1,((iYear-4) mod 10)*2+1,2);
pBuffer:=pBuffer+Copy(szText2,((iYear-4) mod 12)*2+1,2);
pBuffer:=pBuffer+' ';
pBuffer:=pBuffer+Copy(szText3,((iYear-4) mod 12)*2+1,2);
pBuffer:=pBuffer+'年';
end;
function FormatLunarYear(iYear:Word):string;
var
pBuffer:string;
begin
FormatLunarYear(iYear,pBuffer);
Result:=pBuffer;
end;
procedure FormatMonth(iMonth:Word;var pBuffer:string;bLunar:Boolean);
var
szText:string;
begin
if (not bLunar) and (iMonth=1) then
begin
pBuffer:=' 一月';
Exit;
end;
szText:='正二三四五六七八九十';
if iMonth<=10 then
begin
pBuffer:=' ';
pBuffer:=pBuffer+Copy(szText,(iMonth-1)*2+1,2);
pBuffer:=pBuffer+'月';
Exit;
end;
if iMonth=11 then
pBuffer:='十一'
else
pBuffer:='十二';
pBuffer:=pBuffer+'月';
end;
function FormatMonth(iMonth:Word;bLunar:Boolean):string;
var
pBuffer:string;
begin
FormatMonth(iMonth,pBuffer,bLunar);
Result:=pBuffer;
end;
procedure FormatLunarDay(iDay:Word;var pBuffer:string);
var
szText1,szText2:string;
begin
szText1:='初十廿三';
szText2:='一二三四五六七八九十';
if (iDay<>20) and (iDay<>30) then
begin
pBuffer:=Copy(szText1,((iDay-1) div 10)*2+1,2);
pBuffer:=pBuffer+Copy(szText2,((iDay-1) mod 10)*2+1,2);
end
else
begin
pBuffer:=Copy(szText1,(iDay div 10)*2+1,2);
pBuffer:=pBuffer+'十';
end;
end;
function FormatLunarDay(iDay:Word):string;
var
pBuffer:string;
begin
FormatLunarDay(iDay,pBuffer);
Result:=pBuffer;
end;
function
CalcDateDiff(iEndYear,iEndMonth,iEndDay:Word;iStartYear:Word;iStartMonth:Wor
d;iStartDay:Word):Longword;
begin
Result:=Trunc(EncodeDate(iEndYear,iEndMonth,iEndDay)-EncodeDate(iStartYear,i
StartMonth,iStartDay));
end;
function CalcDateDiff(EndDate,StartDate:TDateTime):Longword;
begin
Result:=Trunc(EndDate-StartDate);
end;
function GetLunarDate(iYear,iMonth,iDay:Word;var
iLunarYear,iLunarMonth,iLunarDay:Word):Word;
begin
l_CalcLunarDate(iLunarYear,iLunarMonth,iLunarDay,CalcDateDiff(iYear,iMonth,i
Day));
Result:=l_GetLunarHolDay(iYear,iMonth,iDay);
end;
procedure GetLunarDate(InDate:TDateTime;var
iLunarYear,iLunarMonth,iLunarDay:Word);
begin
l_CalcLunarDate(iLunarYear,iLunarMonth,iLunarDay,CalcDateDiff(InDate,EncodeD
ate(START_YEAR,1,1)));
end;
procedure l_CalcLunarDate(var iYear,iMonth,iDay:Word;iSpanDays:Longword);
var
tmp:Longword;
begin
///阳历1901年2月19日为阴历1901年正月初一
///阳历1901年1月1日到2月19日共有49天
if iSpanDays<49 then
begin
iYear:=START_YEAR-1;
if iSpanDays<19 then
begin
iMonth:=11;
iDay:=11+Word(iSpanDays);
end
else
begin
iMonth:=12;
iDay:=Word(iSpanDays)-18;
end;
Exit;
end;
///下面从阴历1901年正月初一算起
iSpanDays:=iSpanDays-49;
iYear:=START_YEAR;
iMonth:=1;
iDay:=1;
///计算年
tmp:=LunarYearDays(iYear);
while iSpanDays>=tmp do
begin
iSpanDays:=iSpanDays-tmp;
Inc(iYear);
tmp:=LunarYearDays(iYear);
end;
///计算月
tmp:=LoWord(LunarMonthDays(iYear,iMonth));
while iSpanDays>=tmp do
begin
iSpanDays:=iSpanDays-tmp;
if iMonth=GetLeapMonth(iYear) then
begin
tmp:=HiWord(LunarMonthDays(iYear,iMonth));
if iSpanDays<tmp then
Break;
iSpanDays:=iSpanDays-tmp;
end;
Inc(iMonth);
tmp:=LoWord(LunarMonthDays(iYear,iMonth));
end;
///计算日
iDay:=iDay+Word(iSpanDays);
end;
function l_GetLunarHolDay(iYear,iMonth,iDay:Word):Word;
var
Flag:Byte;
Day:Word;
begin
Flag:=gLunarHolDay[(iYear-START_YEAR)*12+iMonth-1];
if iDay<15 then
Day:=15-((Flag shr 4) and $0f)
else
Day:=(Flag and $0f)+15;
if iDay=Day then
if iDay>15 then
Result:=(iMonth-1)*2+2
else
Result:=(iMonth-1)*2+1
else
Result:=0;
end;
function GetLunarHolDay(InDate:TDateTime):string;
var
i,iYear,iMonth,iDay:Word;
begin
DecodeDate(InDate,iYear,iMonth,iDay);
i:=l_GetLunarHolDay(iYear,iMonth,iDay);
case i of
1:Result:='小寒';
2:Result:='大寒';
3:Result:='立春';
4:Result:='雨水';
5:Result:='惊蛰';
6:Result:='春分';
7:Result:='清明';
8:Result:='谷雨';
9:Result:='立夏';
10:Result:='小满';
11:Result:='芒种';
12:Result:='夏至';
13:Result:='小暑';
14:Result:='大暑';
15:Result:='立秋';
16:Result:='处暑';
17:Result:='白露';
18:Result:='秋分';
19:Result:='寒露';
20:Result:='霜降';
21:Result:='立冬';
22:Result:='小雪';
23:Result:='大雪';
24:Result:='冬至';
else
Result:='';
end;
end;
function GetLunarHolDay(iYear,iMonth,iDay:Word):string;
begin
Result:=GetLunarHolDay(EncodeDate(iYear,iMonth,iDay));
end;
end.
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