📄 nldate.pas
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unit NLDate;
interface
uses Windows, SysUtils, Controls;
const
START_YEAR=1901;
END_YEAR=2050;
//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;iStartMonth: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 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 MonthDays(iYear,iMonth:Word):Word;
begin
case iMonth of
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