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    WeeksInYear

    Returns the number of weeks in the year, given a date.

    Declaration

    Source position: dateutil.inc line 119

    function WeeksInYear(const AValue: TDateTime) : Word;

    Arguments

    Name Description
    AValue Day in the year.

    Function result

    Number of weeks.

    Description

    WeeksInYear returns the number of weeks in the year part of AValue. The return value is either 52 or 53.

    Remark:

    The first week of the year is determined according to the ISO 8601 standard: It is the first week that has at least 4 days in it, i.e. it includes a Thursday.

    See also

    Name Description
    WeeksInAYear Returns the number of weeks in a given year.
    DaysInYear Return the number of days in the year in which a date occurs.
    DaysInAYear Number of days in a particular year.
    DaysInMonth Return the number of days in the month in which a date occurs.
    DaysInAMonth Number of days in a month of a certain year.

    Example

    Program Example12;

{ This program demonstrates the WeeksInYear function }

Uses SysUtils,DateUtils;

Var
  Y : Word;

Begin
  For Y:=1992 to 2010 do
    Writeln(Y,' has ',WeeksInYear(EncodeDate(Y,2,1)),' weeks.');
End.