WithinPastMonths

Check whether two datetimes are only a number of months apart

Declaration

Source position: dateutil.inc line 243

function WithinPastMonths(

const ANow: TDateTime;

const AThen: TDateTime;

const AMonths: Integer

):Boolean;

Arguments

`ANow`		First moment in time
`AThen`		Second moment in time
`AMonths`		Number of months to check

Function result

True if ANow and Athen are only AMonths apart, false otherwise

Description

WithinPastMonths compares the timestamps ANow and AThen and returns True if the difference between them is at most AMonths months apart, or False if they are further apart.

Remark:

Since this function uses the MonthsBetween function to calculate the difference in Months, this means that fractional months do not count, and the fractional part is simply dropped, so for two dates actually 2 and a half months apart, the result will also be True

WithinPastYears		Check whether two datetimes are only a number of years apart
WithinPastWeeks		Check whether two datetimes are only a number of weeks apart
WithinPastDays		Check whether two datetimes are only a number of days apart
WithinPastHours		Check whether two datetimes are only a number of hours apart
WithinPastMinutes		Check whether two datetimes are only a number of minutes apart
WithinPastSeconds		Check whether two datetimes are only a number of seconds apart
WithinPastMilliSeconds		Check whether two datetimes are only a number of milliseconds apart

Example

Program Example48;

{ This program demonstrates the WithinPastMonths function }

Uses SysUtils,DateUtils;

Procedure Test(ANow,AThen : TDateTime; AMonths : Integer);

begin
 Write(DateToStr(AThen),' and ',DateToStr(ANow));
 Write(' are within ',AMonths,' months: ');
 Writeln(WithinPastMonths(ANow,AThen,AMonths));
end;

Var
  D1,D2 : TDateTime;

Begin
  D1:=Today;
  D2:=Today-364;
  Test(D1,D2,12);
  D2:=Today-365;
  Test(D1,D2,12);
  D2:=Today-366;
  Test(D1,D2,12);
  D2:=Today-390;
  Test(D1,D2,12);
  D2:=Today-368;
  Test(D1,D2,11);
  D2:=Today-1000;
  Test(D1,D2,31);
  Test(D1,D2,32);
  Test(D1,D2,33);
End.