Now、Date、Time、CurrentYear - 当前日期
SysUtils.Now;
SysUtils.Date;
SysUtils.Time;
SysUtils.CurrentYear;
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unit Unit1;

interface

uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs;

type
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

uses DateUtils;

procedure TForm1.FormCreate(Sender: TObject);
var
dt: TDateTime;
d: TDate;
t: TTime;
y: Word;
begin
dt := Now;
d := Date;
t := Time;
y := CurrentYear;

ShowMessage(DateTimeToStr(dt)); //2009-5-21 17:45:50
ShowMessage(DateToStr(d)); //2009-5-21
ShowMessage(TimeToStr(t)); //17:45:50
ShowMessage(IntToStr(y)); //2009
end;

end.