6常用日期与时间函数.doc

Delphi 6常用日期与时间函数D.1 获取特定的日期与时间本小节将为您介绍Delphi 6所提供的获取特定日期与时间的函数。这些函数稍后将有详细的范例说明。笔者这里将以列表的方式先说明每一个函数所代表的意义,如图示:函数名称单元文件所代表的意义NowSysUtils此函数可返回现在的日期与时间,其返回值为TDateTime类型DateSysUtils此函数可返回现在的日期,其返回值为TDateTime类型TimeSysUtils此函数可返回现在的时间,其返回值为TDateTime类型TodayDateUtils此函数可返回今天的日期,其返回值为TDateTime类型,此函数的结果与Date函数相同。TomorrowDateUtils此函数可返回昨天的日期,其返回值为TDateTime类型YesterdayDateUtils此函数可返回明天的日期,其返回值为TDateTime类型CurrentyearSysUtils此函数可返回现在所属的年度,其返回值为4的整数。例如:2001HoursperdaySysUtils此常数定义每天的小时数。HoursPerDay =24;MinsperdaySysUtils此常数定义每天的分钟数。MinsPerDay = MinsPerDay*60SecsperdaySysUtils此常数定义每天的秒数。SecPerDay = MinsPerDay *60msecsperdaySysUtils此常数定义每天的毫秒数。MSecsPerDay =SecsperDay*1000 Now (返回当前的日期时间)引用单元:SysUtils函数声明:Function Now : TDateTime;范例D-1Procedure TForm1.Button1Click(Sender: TObject);Var MyDateTime : TDateTime;begin MyDateTime :=Now; Showmessage(DateTimeToStr(MyDateTime);end; Date(返回当前的日期)引用单元:SysUtils函数声明:Function Day :TDateTime;范例D-2Procedure TForm1.Button1Click(Sender: TObject);Var MyDateTime : TDateTime;begin MyDateTime :=Date; Showmessage(DateTimeToStr(MyDateTime);end; Time(返回当前的时间)引用单元:SysUtils函数声明:Function Time:TDateTime;范例D-3Procedure TForm1.Button1Click(Sender: TObject);Var MyDateTime : TDateTime;begin MyDateTime :=Time; Showmessage(DateTimeToStr(MyDateTime);end; Today(返回今天的日期)引用单元:DateUtils函数声明:Function Today :TDateTime;范例D-4Procedure TForm1.Button1Click(Sender: TObject);Var MyDateTime : TDateTime;Begin /uses DateUtils MyDateTime :=Today; Showmessage(DateTimeToStr(MyDateTime);end; Tomorrow(返回明天的日期)引用单元:DateUtils函数声明:Function Tomorrow:TDateTime;范例D-5Procedure TForm1.Button1Click(Sender: TObject);Var MyDateTime : TDateTime;Begin /uses DateUtils MyDateTime :=Tomorrow; /MyDateTime : Now +1; /两者相同Showmessage(DateTimeToStr(MyDateTime); /不包含时间部分end; Yesterday(返回昨天的日期)引用单元:DateUtils函数声明:Function Yesterday :TDateTime;范例D-6Procedure TForm1.Button1Click(Sender: TObject);Var MyDateTime : TDateTime;Begin /uses DateUtils MyDateTime :=Yesterday; /MyDateTime : Now -1; /两者相同Showmessage(DateTimeToStr(MyDateTime); /不包含时间部分end; CurrentYear(返回现在所属的年度)引用单元:SysUtils函数声明:Function CurrentYear :Word;范例D-7Procedure TForm1.Button1Click(Sender: TObject);Var ThisYear: Word;Begin this year := CurrentYear;Showmessage(IntToStr(ThisYear); / 4位整数end; HoursPerDay、MinsPerDay、SecsPerDay及MsecsPerDay等日期与时间常数。引用单元:SysUtils函数声明:Function CurrentYear:Word;范例D-8Procedure TForm1.Button1Click(Sender: TObject);BeginShowmessage(每天的小时数= + IntToStr(HoursperDay); /24 Showmessage(每天的分钟数= + IntToStr(MinsperDay); / 1440Showmessage(每天的秒数= + IntToStr(SecsperDay); /24 Showmessage(每天的毫秒数= + IntToStr(MSecsperDay); /24 end;D.2 日期处理函数:函数名称单元文件所代表的意义YearOfDateUtils此函数可获取TDateTime格式中的年度,其返回值为Word类型。YearsBeTweenDateUtils此函数可返回两个指定日期间的年份,一年以365.25天为计算单位。其返回值不包含小数部分YearSpanDateUtils此函数可返回两个指定日期间的年份,一年以365.25天为计算单位。其返回值包含小数部分StartOfAYearDateUtils此函数可返回特定年份的第一天EndOfAYearDateUtils此函数可返回特定年份的最后一天StrtOfTheYearDateUtils此函数可返回特定日期的该年第一天EndOfTheYearDateUtils此函数可返回特定日期的该年最后一天IncYearDateUtils此函数可将指定的TDateTime变量加上指定的年度,其默认值为1年MonthOfDateUtils此函数可获取TDateTime格式中的月份,其返回值为Word类型MonthOfTheYearDateUtils此函数可获取TDateTime格式中的月份,其返回值为Word类型MonthBetweenDateUtils次函数可返回两个指定日期间的月份数,一个月以30.4375天为计算单位。其返回值不包含小数部分MonthSpanDateUtils次函数可返回两个指定日期间的月份数,一个月以30.4375天为计算单位。其返回值包含小数部分StartOfAMonthDateUtils此函数可返回特定年月的第一天EndOfAMonthDateUtils此函数可返回特定年月的最后一天StartOfTheMonthDateUtils此函数可返回指定日期的该年的第一天EndOfTheMonthDateUtils此函数可返回指定日期的该年的最后一天IncMonthDateUtils此函数可将指定的TDateTime变量加上指定的月份,其默认值为加上1个月IncAMonthDateUtils此函数可将指定的年月日加上指定的月份,其默认值为加上1个月DaysInAYearDateUtils此函数可返回指定年份的总天数DaysInYearDateUtils此函数可返回指定TDateTime变量中该年分的总天数DaysInAMonthDateUtils此函数可返回指定月份的总天数DaysInMonthDateUtils此函数可返回指定TDateTime变量中该月份的总天数DaysOfDateUtils此函数可获取TDateTime格式中的日期,其返回值为Word类型DaysBetweenDateUtils此函数可获取格式中的日期,其返回值不包含小数部分DaySpanDateUtils此函数可返回两个指定日期间的天数,其返回值包含小数部分DayOfTheYearDateUtils此函数可返回指定TDateTime变量为该年的第几天。例如2月1日则返回32DayOfTheMonthDateUtils此函数可返回指定TDateTime变量为该月的第几天,其返回值介于1到31DayOfTheWeekDateUtils此函数可返回指定TDateTime变量为该周的第几天,其返回值介于1到7。星期一为第一天。DayOfWeekDateUtils此函数可返回指定TDateTime变量为该周的第几天,其返回值介于1到7。星期日为第一天。StartOfADayDateUtils此函数可返回指定日期一天的开始时间,其返回值为TDateTime类型。其时间默认为12:00:000 AMEndOfADayDateUtils此函数可返回指定日期一天的结束时间,其返回值为TDateTime类型。其时间默认为11:59:999 PMStartOfTheDayDateUtils此函数可返回指定TDateTime变量的一天开始时间,其返回值为TDateTime类型。其时间默认为:12:00:000 AMEndOfTheDayDateUtils此函数可返回指定TDateTime变量的一天结束时间,其返回值为TDateTime类型。其时间默认为11:59:999PMIncDayDateUtils此函数可为指定日期加上特定的天数,其返回值为TDateTime类型,其默认天数为1天WeeksInAYearDateUtils此函数可返回指定年度的周数,其返回值不是52就是53WeeksInYearDateUtils此函数可返回指定TDateTime变量的周数,其返回值不是52就是53WeekOfDateUtils次函数可返回指定日期为该年的第几周,其返回值为153WeekOfTheYearDateUtils次函数可返回指定日期为该年的第几周,其返回值为153WeekOfTheMonthDateUtils次函数可返回指定日期为该月的第几周,其返回值为16WeeksBetweenDateUtils此函数可返回两个指定日期间的周数,其返回值不包含小数部分WeekSpanDateUtils此函数可返回两个指定日期间的周数,其返回值包含小数部分StartOfAweekDateUtils此函数可返回指定日期一周的开始时间,其返回值为TDateTime类型。其时间默认为12:00:000 PMEndOfAWeekDateUtils此函数可返回指定日期一周的结束时间,其返回值为TDateTime类型。其时间默认为11:59:999 PMStartOfTheWeekDateUtils此函数可返回指定TDateTime变量的一周开始时间,其返回值为TDateTime类型。其其时间默认为12:00:000 AMEndOfTheWeekDateUtils此函数可返回指定TDateTime变量的一周结束时间,其返回值为TDateTime类型。其时间默认为11:59:999 AMIncWeekDateUtils此函数可将指定日期加上指定周数,其返回值为TDateTime类型 YearOf(返回指定日期的年度)引用单元:DateUtils函数声明:Function YearOf ( const AValue : TDateTime) :Word;范例D-9Procedure TForm1.Button1Click(Sender: TObject);Begin /三者都相同 Showmessage(年度= + IntToStr(YearOf(Now); Showmessage(年度= + IntToStr(YearOf(Date); Showmessage(年度= + IntToStr(YearOf(Today); end; YearsBetween(返回两个指定日期间的年份)引用单元:DateUtils函数声明:Function YearsBetween ( const ANow, AThen : TDateTime) :Integer;范例D-10Procedure TForm1.Button1Click(Sender: TObject);Begin/不包含小数,一年以365.25天为计算单位Showmessage(几年= + IntToStr(YearsBetween(Now,Now+560); /1end; YearSpan(返回两个指定日期间的年份)引用单元:DateUtils函数声明:Function YearsSpan( const ANow , AThen : TDateTime) :Double;范例D-11Procedure TForm1.Button1Click(Sender: TObject);Begin/包含小数,一年以365.25天为计算单位Showmessage(几年= + FloatToStr(YearSpan(Now,Now+560); /1.53.end; StartOfAYear(返回特定年份的第一天)引用单元:DateUtils函数声明:Function StartOfAYear ( const AYear) : TDateTime;范例D-12Procedure TForm1.Button1Click(Sender: TObject);BeginShowmessage(DateTimeToStr(StartOfAYear(2001);/2001/1/1 早上12:00:00end; EndOfAYear(返回特定年份的最后一天)引用单元:DateUtils函数声明:Function EndOfAYear ( const AYear) : TDateTime;范例D-13Procedure TForm1.Button1Click(Sender: TObject);BeginShowmessage(DateTimeToStr(EndOfAYear(2001);/2001/12/31 下午11:59:59end; StartOfTheYear(返回指定日期的该年的第一天)引用单元:DateUtils函数声明:Function StartOfTheYear ( const AValue : TDateTime) :TDateTime;范例D-14Procedure TForm1.Button1Click(Sender: TObject);BeginShowmessage(DateTimeToStr(StarOfTheYear(Now);/指定的年度/1/1早上12:00:00end; EndOfTheYear(返回指定日期的该年的最后一天)引用单元:DateUtils函数声明:Function EndOfTheYear ( const AValue : TDateTime) :TDateTime;范例D-15Procedure TForm1.Button1Click(Sender: TObject);BeginShowmessage(DateTimeToStr(StarOfTheYear(Now);/指定年度/12/31下午11:59:59end; IncYear(将指定的TDateTime变量加上指定的年)引用单元:DateUtils函数声明:Function IncYear ( const AValue : TDateTimel; const ANumberOfYears : Integer =1) :TDateTime;范例D-16 Procedure TForm1.Button1Click(Sender: TObject);var myDateTime : TDateTime;Begin myDateTime : = IncYear(Now,3); /往后加3年 Showmessage(DateTimeToStr(myDateTime);End; MonthOf(获取TDateTime格式中的月份)引用单元:DateUtils函数声明:Function MonthOf ( const AValue : TDateTime) :Word;范例D-17 Procedure TForm1.Button1Click(Sender: TObject);var myDateTime : TDateTime; m : Integer;Begin myDateTime : = Now; /两个函数获取相同的结果m := MonthofTheYear(myDateTime); Showmessage(IntToStr(m);end; MonthOfTheYear(获取TDateTime格式中的月份)引用单元:DateUtils函数声明:Function MonthOfTheYear ( const AValue : TDateTime) :Word;范例D-18 Procedure TForm1.Button1Click(Sender: TObject);vari :Integer;f :Double;Begin i := MonthsBetween(Now,Now+89);/差89天 Showmessage(IntToStr(i);/2 f := MonthSpan(Now,Now+89);/差89天 Showmessage(FloatToStr(f);/2.924End; MonthsBetween(返回两个指定日期间的月份数)引用单元:DateUtils函数声明:Function MonthsBetween ( const ANow, AThen : TDateTime) :Integer; MonthSpan(返回两个指定日期间的月份数)引用单元:DateUtils函数声明:Function MonthSpan ( const ANow, AThen : TDateTime) :Double; StartOfAMonth(返回特定年月的第一天)引用单元:DateUtils函数声明:Function StartOfAMonth ( const AYear, AMonth : Word) : TDateTime; EndOfAMonth(返回特定年月的最后一天)引用单元:DateUtils函数声明:Function EndOfTheMonth ( const AYear, AMonth : Word) : TDateTime; StartOfTheMonth(返回特定年月的第一天)引用单元:DateUtils函数声明:Function StartOfTheMonth ( const AValue : TDateTime) :TDateTime; EndOfTheMonth(返回特定年月的最后一天)引用单元:DateUtils函数声明:Function EndOfTheMonth ( const AValue : TDateTime) :TDateTime;范例D-19var myDateTime :TDateTime; Year,Month :Integer;Begin Year := YearOf(Now); Month :=MonthOf(Now); /找出当前月份的第一天 myDateTime := StartOfAMonth(Year,Month); Showmessage(DateTimeToStr(myDateTime); /找出当前月份的最后一天 myDateTime := EndOfAMonth(Year,Month); Showmessage(DateTimeToStr(myDateTime); /找出当前月份的第一天 myDateTime := StartOfTheMonth(Now); Showmessage(DateTimeToStr(myDateTime); /找出当前月份的最后一天 myDateTime := EndOfTheMonth(Now); Showmessage(DateTimeToStr(myDateTime);end; IncMonth(指定的TDateTime变量加上指定的月份)引用单元:DateUtils函数声明:Function IncMonth ( const Date : TDateTime ; NumberOfMonths : Integer = 1) :TDateTime; IncAMonth(指定的年月日变量加上指定的月份)引用单元:DateUtils函数声明:Procedure IncAMonth ( Var Year, Month , Day : Word ; NumberOfMonths : Integer =1 );范例D-20var myDateTime :TDateTime; Year,Month,Day :Word;Begin /加上指定的月份 myDateTime := IncMonth(Now,3);/加上三个月 Showmessage(DateTimeToStr(myDateTime); Year := YearOf(Now); Day := Dayof(Now);/加上指定的月份IncAMonth(Year,Month,Day,3);Showmessage(Month+IntToStr(Month);end ; DaysInAYear(返回指定年份的总天数)引用单元:DateUtils函数声明:Function DaysInAYear ( const AYear : Word) :Word; DaysInYear(返回指定TDateTime变量中该年份的总天数)引用单元:DateUtils函数声明:Function MinuteOfTheHour ( const AValue : TDateTime) :Word; DaysInAMonth(返回指定月份的总天数)引用单元:DateUtils函数声明:Function DaysInAMonth ( const AYear , AMonth : Word) :Word; DaysInMonth(返回指定TDateTime变量中该月份的总天数)引用单元:DateUtils函数声明:Function DaysInMonth ( const AValue : TDateTime) :Word;范例D-21procedure TForm1.Button1Click(Sender : TObfect) ;var myDateTime : TDateTime ; Year, Month : Word ; I : Integer ;Begin Year := YearOf(Now) ; /获取指定年份的总天数 i := DaysInAYear(Year) ; Showmessage(DaysInAYear=+IntToStr (i) ; i := DaysInYear(now) ; Showmessage(DaysInMonth = + IntToStr (i) ; /获取指定月份的总天数 Month := MonthOf(Now) ; i := DaysInMonth(Now) ; Showmessage( DaysInMonth = +IntToStr(i) ;end; DaysOf(获取TDateTime格式中的日期)引用单元:DateUtils函数声明:Function DaysOf ( const AValue : TDateTime) :Word;范例D-22procedure TForm1.Button1Click(Sender : TObfect) ;var Day : Word ;begin /获取指定TDateTime的日期 Day := DayOf(Now) ; Showmessage(IntToStr(Day) ;end ; DaysBetween(返回两个指定日期间的天数)引用单元:DateUtils函数声明:Function DaysBetween( const ANow, AThen : TDateTime) :Integer; DaySpan(返回两个指定日期间的天数)引用单元:DateUtils函数声明:Function DaySpan ( const ANow , AThen : TDateTime) :Double;范例D-23vari : Integer ;f : Double ;begin /获取两个日期的天数 f:=DaySpan(Now-100 , Now) ; i := DaysBetween(Now-100 , Now) ; Showmessage(intToStr(i) ; /100 Showmessage(FloatToStr(f) ; /100 end ; DayOfTheYear(返回指定TDateTime变量为该年的第几天)引用单元:DateUtils函数声明:Function DayOfTheYear ( const AValue : TDateTime) :Word; DayOfTheMonth(返回指定TDateTime变量为该月的第几天)引用单元:DateUtils函数声明:Function DayOfTheMonth ( const AValue : TDateTime) :Word; DayOfTheWeek(返回指定TDateTime变量为该周的第几天)引用单元:DateUtils函数声明:Function DayOfTheWeek ( const AValue : TDateTime) :Word; DayOfWeek(返回指定TDateTime变量为该周的第几天)引用单元:DateUtils函数声明:Function DayOfWeek ( Date : TDateTime) :Integer;范例D-24procedure TForm1.Button1Click(Sender : TObfect) ;var i : Integer ;begin /返回指定TDateTime为该年的第几天 i := DayOfTheYear(Now) ; Showmessage(IntToStr(i) ; /返回指定TDateTime为该月的第几天 i := DayOfTheMonth(Now) ; Showmessage(IntToStr(i) ; /返回指定TDateTime为该周的第几天(星期一为第一天) i := DayOfTheWeek(Now) ; Showmessage(IntToStr(i) ;end ; StartOfADay(返回指定日期一天的开始)引用单元:DateUtils函数声明:Function StartOfADay ( const AYear , AMonth, ADay : Word) :TDateTime; Function StartOfADay ( const AYear , ADayOfYear : Word) :TDateTime;范例D-25procedure TForm1.Button1Click(Sender : TObfect) ;var tmpDateTime : TDateTime ; AYear , ADayOfYear , AMonth , ADay :Word ;begin AYear := 2001 ; /指定年度 ADayOfYear := 32 ;./第32天 tmpDateTime :=StartOfADay(AYear , ADayOfYear) ; Showmessage(DateTimeToStr(tmpDateTime) ; /2001/02/01 AMonth := 1 ; ADay := 32 ; /从AMonth第一天起第32天 TmpDateTime := StartOfADay(AYear , AMonth , ADay) ;Showmessage(DateTimeToStr(tmpDateTime) ; /2001/02/01end ; EndOfADay(返回指定日期一天的结束时间)引用单元:DateUtils函数声明:Function EndOfADay ( const AYear, AMonth,ADay : Word) : TDateTime; Function EndOfADay ( const AYear, ADayOfYear : Word) : TDateTime;范例D-26procedure TForm1.Button1Click(Sender : TObfect) ;var tmpDateTime : TDateTime ; AYear , ADayOfYear , AMonth , ADay : Word ;beginAYear := 2001 ; /指定年度 ADayOfYear := 32 ; /第32天 tmpDateTime := EndOfADay(AYear , AMonth , ADay) ; Showmessage(DateTimeToStr(tmpDateTime) ; /2001/02/01 PM 11:59:59end ; StartOfTheDay(返回指定TDateTime变量的一天开始时间)引用单元:DateUtils函数声明:Function StartToTheDay ( const AValue : TDateTime) :TDateTime; EndOfTheDay(返回指定TDateTime变量的一天结束时间)引用单元:DateUtils函数声明:Function EndOfTheDay ( const AValue : TDateTime) : TDateTime;范例D-27procedure TForm1.Button1Click(Sender : TObfect) ;var tmpDateTime : TDateTime ;begin tmpDateTime := StartOfTheDay(Now) ; Showmessage(DateTimeToStr(tmpDateTime) ; /YYYY/MM/DD AM 12:00:00 tmpDateTime := EndOfTheDay(Now) ; Showmessage(DateToeTpStr(tmpDateTime) ; /YYYY/MM/DD PM 11:59:59end ; IncDay(可为指定日期加上特定的天数)引用单元:DateUtils函数声明:Function IncDay ( const AValue : TDateTime ; const ANumberOfDays : Integer =1) :TDateTime;范例D-28procedure TForm1.Button1Click(Sender : TObfect) ;var tmpDateTime : TDateTime ;begin tmpDateTime := Incday(Now,5) ; Showmessage(DateTimeToStr(tmpDateTime) ; /时间部分并不会改变end ; WeeksInAYear(返回指定年度的周数)引用单元:DateUtils函数声明:Function WeeksInAYear( const AYear : Word) :Word; WeeksInYear(返回指定TDateTime变量的周数)引用单元:DateUtils函数声明:Function WeeksInYear ( const AValue : TDateTime) :Word;范例D-29procedure TForm1.Button1Click(Sender : TObfect) ;varweeks : word ;begin weeks :=weeksInAYear(2001) ; Showmessage(IntToStr(weeks) ; /52 Weeks := WeeksInYear(Now) ; Showmessage(IntToStr(weeks) ; /52end ; WeeksOf(返回指定日期为该年的第几周)引用单元:DateUtils函数声明:Function WeekOf ( const AValue : TDateTime) :Word; WeekOfTheYear(返回指定日期为该年的第几周)引用单元:DateUtils函数声明:Function WeekOfTheYear ( const AValue : TDateTime) :Word; WeekOfTheMonth(返回指定日期为该月的第几周)引用单元:DateUtils函数声明:Function WeekOfTheMonth ( const AValue : TDateTime) :Word;范例D-30Procedure TForm1.Button1Click(Sender: TObject);Var I : Word;Begin I :=WeekOf(Now);Showmessage(weekof= + IntToStr(i); i := WeekOfTheYear(Now );Showmessage(WeekOfTheYear = + IntToStr(i);I := WeekOfTheMonth(Now); Showmessage(WeekOfTheMonth= + IntToStr(i); end; WeeksBetween(返回两个指定日期间的周数)引用单元:DateUtils函数声明:Function WeeksBetween ( const ANow , AThen, : TDateTime) :Integer; WeekSpan(返回两个指定日期间的周数)引用单元:DateUtils函数声明:Function WeekSpan( const ANow ,AThen : TDateTime) :Double;范例D-31Procedure TForm1.Button1Click(Sender: TObject);Var I : Integer; F :Double;Begin I :=WeeksBetween(Now , Now + 29);Showmessage(InttoStr(i); /4F := WeekSpan(Now , Now + 29); Showmessage(FloatToStr(f); /4.14end; StartOfAWeek(返回指定日期一周的开始时间)引用单元:DateUtils函数声明:Function StartOfAWeek ( const AYear , AWeekOfYear : Word; const ADayOfWeek : Word = 1) : TDateTime; EndOfAWeek(返回指定日期一周的结束时间)引用单元:DateUtils函数声明:Function EndOfAWeek ( const AYear , AWeekOfYear : Word; const ADayOfWeek : Word = 7) : TDateTime;范例D-32Procedure TForm1.Button1Click(Sender: TObject);Var tempDateTime: TDateTime; AYear , AWeekOfYear , ADayOfWeek : Word;Begin AYear := 2001;AWeekOfYear :=2; /第二周ADayOfWeek :=1; /第一天tempDateTime := StartofAweek(AYear, AWeekOfYear, ADayOfWeek);/2001/01/08 AM 12:00:00:00showmessage(DateTimeToStr(tempDateTime);/AYearf := 2001;/AWeekofYear :=2; /第二周ADayOfWeek : =7 ;/ 第七天tempDatetime := EndOfAWeek(AYear, AWeekOfYear, AdayOfWeek);/2001/01/14 Pm 11:59:59 Showmessage(DateTimeToStr(tempDateTime); /4.14end; StartOfTheWeek(返回指定日期一周的开始时间)引用单元:DateUtils函数声明:Function StartOfTheWeek ( const AValue : TDateTime) :TDateTime; EndOfTheWeek(返回指定日期一周的结束时间)引用单元:DateUtils函数声明:Function EndOfTheWeek ( const AValue : TDateTime) :TDateTime;范例D-33Procedure TForm1.Button1Click(Sender: TObject);Var tempDateTime : TDateTime;begin tempDateTime :=StartOfTheWeek(Now); /YYYY