System.DateUtils.StartOfAWeek
Delphi
function StartOfAWeek(const AYear, AWeekOfYear, ADayOfWeek: Word): TDateTime;
C++
extern DELPHI_PACKAGE System::TDateTime __fastcall StartOfAWeek(const System::Word AYear, const System::Word AWeekOfYear, const System::Word ADayOfWeek = (System::Word)(0x1));
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| function | public | System.DateUtils.pas System.DateUtils.hpp |
System.DateUtils | System.DateUtils |
Description
Returns a TDateTime that represents the first moment on a specified day of a specified week.
StartOfAWeek returns the first expressible moment (12:00:00.000 A.M.) of the specified day of the specified week.
The AYear parameter specifies the year of the desired day.
The AWeekOfYear parameter specifies the week of the year, where 1 is the first week in AYear that includes four or more days.
The ADayOfWeek parameter indicates the desired day in the specified week, where 1 is Monday, 2 is Tuesday, and so on.
If the parameters do not specify a valid date, StartOfAWeek raises an EConvertError exception.
Note: The definitions for AWeekOfYear and ADayOfWeek follow the ISO 8601 standard.
See Also