Unit 'DateUtils' Package
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WithinPastMonths

Check whether two TDateTimes are only a number of months apart.

Declaration

Source position: dateutil.inc line 259

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

See also

WithinPastYears

  

Check whether two TDateTimes are only a number of years apart.

WithinPastWeeks

  

Check whether two TDateTimes are only a number of weeks apart.

WithinPastDays

  

Check whether two TDateTimes are only a number of days apart.

WithinPastHours

  

Check whether two TDateTimes are only a number of hours apart.

WithinPastMinutes

  

Check whether two TDateTimes are only a number of minutes apart.

WithinPastSeconds

  

Check whether two TDateTimes are only a number of seconds apart.

WithinPastMilliSeconds

  

Check whether two TDateTimes 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.

Documentation generated on: Jul 24 2023