---
url: >-
  /statelake/scripting-reference/functions-and-procedures/datetime-functions/encodedayofweekinmonth.md
---

# EncodeDayOfWeekInMonth

The reverse of **DecodeDayOfWeekInMonth** , this **EncodeDayOfWeekInMonth** function returns a **TDateTime** that represents a specified instance of a day ADayOfWeek, of a specified month **AMonth**, in a specified year **AYear**.

The time portion of the return value is 00:00:00 - midnight at the start of the specified day **ADayOfWeek**.

The definition for **ADayOfWeek** follow the ISO 8601 standard.

* **AYear** is the year which can be any value from 1 through 9999 inclusive.

* **AMonth** can be any month value from 1 through to 12 inclusive.

* **ANthDayOfWeek** is the occurrence of the specified day of the week that is specified by **ADayOfWeek**, and can be a number from 1 to 5 inclusive, indicating the week within the specified month.

  * If a month does not include 5 Mondays, setting **ANthDayOfWeek** to 5 and **ADayOfWeek** to 1 causes **EncodeDayOfWeekInMonth** to raise an exception error.

* **ADayOfWeek** is the day of the week, where 1 is Monday, 2 is Tuesday e.t.c., with 7 representing Sunday.

**Declaration**: function EncodeDayOfWeekInMonth(const AYear, AMonth, ANthDayOfWeek, ADayOfWeek: Word): TDateTime;

```pascal
procedure OnMapEvent(var Value:Variant);
var
  aYear, aMonth, aNth, aDay : word;
begin
  aYear := 2024;
  aMonth := 5
  aNth := 2;
  aDay := 5;

 //Create a date/time from its separate parts - returns 10-05-2024 00:00:00:0000
  LogInfo(FormatDateTime('dd-mm-yyyy hh:nn:ss.zzz',EncodeDayOfWeekInMonth(aYear, aMonth, aNth, aDay)));
  LogInfo('');

end;
```