Calculate Workdays From A Date

This is one way you can add a number of workdays to a specific date and return a workday (monday-friday).CREATE FUNCTION [dbo].[fnAddWorkdays]
(
@StartDate DATETIME,
@DaysToAdd INT
)
RETURNS DATETIME
AS
BEGIN
RETURN@StartDate
+ CASE(@@DATEFIRST + (DATEPART(WEEKDAY, @StartDate) - 2)) % 7 WHEN 5 THEN 2 WHEN 6 THEN 1 ELSE 0 END
+ @DaysToAdd / 5 * 7
+ @DaysToAdd % 5
+ CASE WHEN (@@DATEFIRST + (DATEPART(WEEKDAY, @StartDate + CASE (@@DATEFIRST + (DATEPART(WEEKDAY, @StartDate) - 2)) % 7 WHEN 5 THEN 2 WHEN 6 THEN 1 ELSE 0 END) - 2)) % 7 + @DaysToAdd % 5 > 4
THEN 2
ELSE 0
END
END

E 12°55'05.25"
N 56°04'39.16"