StartOfAWeek

Return a day of the week, given a year, week and day in the week.

Declaration

Source position: dateutil.inc line 155

  function StartOfAWeek(const AYear: Word; const AWeekOfYear: Word; 
                       const ADayOfWeek: Word) : TDateTime;
  function StartOfAWeek(const AYear: Word; const AWeekOfYear: Word)
                        : TDateTime;

Description

StartOfAWeek returns a TDateTime value with the date of the indicated day of the week indicated by the AYear, AWeek, ADayOfWeek values.

The default value for ADayOfWeek is 1.

See also

Name Description
EndOfAMonth Calculate a TDateTime value representing the last day of the indicated month
EndOfAWeek Return the last moment of day of the week, given a year and a week in the year.
EndOfAYear Calculate a TDateTime value representing the last day of a year
EndOfTheMonth Calculate a TDateTime value representing the last day of the month, given a day in that month.
EndOfTheWeek Calculate a TDateTime value which represents the end of a week, given a date in that week.
EndOfTheYear Calculate a TDateTime value representing the last day of a year, given a date in that year.
StartOfAMonth Return first date of month, given a year/month pair.
StartOfTheWeek Return the first day of the week, given a date.

Example

Program Example34;
{ This program demonstrates the StartOfAWeek function }
Uses SysUtils,DateUtils;
Const
  Fmt = '"First day of this week : "dd mmmm yyyy hh:nn:ss';
  Fmt2 = '"Second day of this week : "dd mmmm yyyy hh:nn:ss';
Var
  Y,W : Word;
Begin
  Y:=YearOf(Today);
  W:=WeekOf(Today);
  Writeln(FormatDateTime(Fmt,StartOfAWeek(Y,W)));
  Writeln(FormatDateTime(Fmt2,StartOfAWeek(Y,W,2)));
End.