Calculate week of month starting Monday

Question

I have this function that works very well to calculate the week of month - i need it to start the week from Monday

CREATE FUNCTION dbo.ufs_FirstofMonth (@theDate         


        

Answer 1

Add the following as the first line in your functions:

SET DATEFIRST 1 -- Set Monday as the first day of the week

Ref. SET DATEFIRST (Transact-SQL) - Sets the first day of the week to a number from 1 through 7. The U.S. English default is 7, Sunday.