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

# WithinPastYears

Check whether two TDateTimes are only a number of years apart

## Declaration

Source position: dateutil.inc line 256

 function WithinPastYears( const ANow: TDateTime; const AThen: TDateTime; const AYears: Integer ):Boolean;

## Arguments

 ANow First moment in time AThen Second moment in time AYears Number of years to check

## Function result

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

## Description

WithinPastYears compares the timestamps ANow and AThen and returns True if the difference between them is at most AYears years apart, or False if they are further apart.

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

 WithinPastMonths Check whether two TDateTimes are only a number of months 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 Example47;

{ This program demonstrates the WithinPastYears function }

Uses SysUtils,DateUtils;

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

begin
Write(DateToStr(AThen),' and ',DateToStr(ANow));
Write(' are within ',AYears,' years: ');
Writeln(WithinPastYears(ANow,AThen,AYears));
end;

Var
D1,D2 : TDateTime;

Begin
D1:=Today;
D2:=Today-364;
Test(D1,D2,1);
D2:=Today-365;
Test(D1,D2,1);
D2:=Today-366;
Test(D1,D2,1);
D2:=Today-390;
Test(D1,D2,1);
D2:=Today-368;
Test(D1,D2,1);
D2:=Today-1000;
Test(D1,D2,1);
Test(D1,D2,2);
Test(D1,D2,3);
End.
```