Yesterday、Today、Tomorrow - 昨天、今天、明天
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
t1,t2,t3: TDateTime;
begin
t1 := Yesterday;
t2 := Today; //同 SysUtils.Date;
t3 := Tomorrow;


ShowMessageFmt('%s, %s, %s', [DateToStr(t1), DateToStr(t2), DateToStr(t3)]);
{2009-5-20, 2009-5-21, 2009-5-22}
end;

end.