StartOfTheMonth

Calculate the first day of the month, given a date in that month.

Declaration

Source position: dateutil.inc line 142

function StartOfTheMonth(

const AValue: TDateTime

):TDateTime;

Arguments

AValue

Date to return first of month from

Function result

First day of month as a TDateTime value.

Description

StartOfTheMonth extracts the year and month parts of AValue and returns a TDateTime value with the date of the first day of that year and month as the StartOfAMonth function.

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
StartOfAWeek		Return a day of the week, given a year, week and day in the week.
StartOfTheWeek		Return the first day of the week, given a date.

Example

Program Example28;

{ This program demonstrates the StartOfTheMonth function }

Uses SysUtils,DateUtils;

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

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