IsValidDate

Check whether a set of values is a valid date indication.

Declaration

Source position: dateutil.inc line 85

function IsValidDate(

const AYear: Word;

const AMonth: Word;

const ADay: Word

):Boolean;

Arguments

`AYear`		Year value
`AMonth`		Month in the year
`ADay`		Day in the month

Function result

True if the given values form a valid date, False if not.

Description

IsValidDate returns True when the values AYear, AMonth, ADay form a valid date indication. If one of the values is not valid (e.g. the day is invalid or does not exist in that particular month), False is returned.

AYear must be in the range 1..9999 to be valid.

IsValidTime		Check whether a set of values is a valid time indication.
IsValidDateTime		Check whether a set of values is a valid date and time indication.
IsValidDateDay		Check whether a given year/day of year combination is a valid date.
IsValidDateWeek		Check whether a given year/week/day of the week combination is a valid day.
IsValidDateMonthWeek		Check whether a given year/month/week/day of the week combination is a valid day

Example

Program Example5;

{ This program demonstrates the IsValidDate function }

Uses SysUtils,DateUtils;

Var
  Y,M,D : Word;

Begin
  For Y:=2000 to 2004 do
   For M:=1 to 12 do
     For D:=1 to 31 do
       If Not IsValidDate(Y,M,D) then
         Writeln(D,' is not a valid day in ',Y,'/',M);
End.