StartOfTheMonth

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

Declaration

Source position: dateutil.inc line 143

  function StartOfTheMonth(const AValue: TDateTime) : TDateTime;

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.

See also

Name	Description
EndOfAMonth	Calculate a TDateTime value representing the last day of the indicated month
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.
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.
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.