How to get yesterday date in Delphi-CodePudding

I know you can get the current date and time using the Now() function, but how would you get the date of yesterday?

CodePudding user response：

You can use the Yesterday function from DateUtils as follow:

uses DateUtils;

begin
  ShowMessage('Yesterday = '   DateToStr(Yesterday)); // Date of yesterday
  ShowMessage('Today     = '   DateToStr(Date)); // Date of Today
  ShowMessage('Tomorrow  = '   DateToStr(tomorrow)); // Date of tomorrow
end;

These functions return a TDateTime data type. The time component is set to zero.

CodePudding user response：

Why not just use Date - 1 ?

Since one day is 1.0 in TDateTime encoding, substracting 1 is enough.