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

StartOfTheWeek

Return the first day of the week, given a date.

Declaration

Source position: dateutil.inc line 152

function StartOfTheWeek(

  const AValue: TDateTime

):TDateTime;

Arguments

AValue

  

Day in the week.

Function result

First day of the week, in TDateTime format.

Description

StartOfTheWeek extracts the year and week parts of AValue and returns a TDateTime value with the date of the first day of that week as the StartOfAWeek function.

See also

StartOfAWeek

  

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

EndOfTheWeek

  

Calculate a DateTime value which represents the end of a week, given a date in that week.

EndOfAWeek

  

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

StartOfAMonth

  

Return first date of month, given a year/month pair.

EndOfTheYear

  

Calculate a DateTime value representing the last day of a year, given a date in that year.

EndOfAYear

  

Calculate a DateTime value representing the last day of a year

EndOfTheMonth

  

Calculate a DateTime value representing the last day of the month, given a day in that month.

EndOfAMonth

  

Calculate a datetime value representing the last day of the indicated month

Example

Program Example32;

{ This program demonstrates the StartOfTheWeek function }

Uses SysUtils,DateUtils;

Const
  Fmt = '"First day of this week : "dd mmmm yyyy';

Begin
  Writeln(FormatDateTime(Fmt,StartOfTheWeek(Today)));
End.
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