[Overview][Constants][Procedures and functions][Index] Reference for unit 'dateutils' (#rtl)

# WithinPastMonths

Check whether two datetimes are only a number of months apart

## Declaration

Source position: dateutil.inc line 244

 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.
```