DayOfTheYear returns the number of days between a specified TDateTime value and 31st December of the previous year, as specified by AValue.

You would use this function DayOfTheYear to obtain the ordinal position of day within its year.

A TDateTime value that refers to 1st January generates a result of 1; 2nd January returns a 2; 1st February returns 32, e.t.c.

Declaration: function DayOfTheYear(const AValue: TDateTime): Word;

A code example follows.

procedure OnMapEvent(var Value:Variant);
var
TheDay : word;
begin
//If YESTERDAY is 28-11-2023 then the result is 332
TheDay := DayOfTheYear(Yesterday);
LogInfo('The number of days since 31st Dec are '+IntToStr(TheDay));
end;