StartOfTheDay

Calculate the start of the day as a DateTime value, given a moment in the day.

Declaration

Source position: dateutil.inc line 164

function StartOfTheDay(

const AValue: TDateTime

):TDateTime;

Arguments

AValue

DateTime from which to calculate start of the day.

Function result

Start of the day (00:00) as DateTime value

Description

StartOfTheDay extracts the date part of AValue and returns a TDateTime value with the date/time indication of the start (0:0:0.000) of this day.

StartOfADay		Return the start of a day as a DateTime value, given a day indication
StartOfTheWeek		Return the first day of the week, given a date.
StartOfAWeek		Return a day of the week, given a year, week and day in the week.
StartOfAMonth		Return first date of month, given a year/month pair.
StartOfTheMonth		Calculate the first day of the month, given a date in that month.
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.
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
EndOftheDay		Calculate a datetime value that represents the end of a given day.
EndOfADay		Calculates a DateTime value representing the end of a specified day

Example

Program Example36;

{ This program demonstrates the StartOfTheDay function }

Uses SysUtils,DateUtils;

Const
  Fmt = '"Start of the day : "dd mmmm yyyy hh:nn:ss';


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