StartOfTheDay
Calculate the start of the day as a TDateTime value, given a moment in the day.
Declaration
Source position: dateutil.inc line 165
function StartOfTheDay(const AValue: TDateTime) : TDateTime;
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.
See also
| Name | Description |
|---|---|
| EndOfADay | Calculates a TDateTime value representing the end of a specified day |
| 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 |
| EndOftheDay | Calculate a TDateTime value that represents the end of a given day. |
| 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. |
| StartOfADay | Return the start of a day as a TDateTime value, given a day indication |
| StartOfAMonth | Return first date of month, given a year/month pair. |
| StartOfAWeek | Return a day of the week, given a year, week and day in the week. |
| StartOfTheMonth | Calculate the first day of the month, given a date in that month. |
| StartOfTheWeek | Return the first day of the week, given a date. |
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.