GetFirstDayOfIso8601WeekOfYear

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This function returns a Date-Time that represents the first day of a given week of year according to ISO 8601.

You can call the GetFirstDayOfIso8601WeekOfYear function using the following syntax:

GetFirstDayOfIso8601WeekOfYear Function Syntax

GetFirstDayOfIso8601WeekOfYear(<year>, <weekofyear>)

The parameters of the function are:

Name	Description
year	The year to which the week of year belongs.
weekofyear	The week of year for which to return the first day.
Examples
The following expression returns a Date-Time that contains the first day of the week of year 37 of 2021:

GetFirstDayOfIso8601WeekOfYear Function Example

GetFirstDayOfIso8601WeekOfYear(2021, 37)

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