Qtr function

I am using this function to get the qtr number by passing the date, so far it is working perfectly, just thought of taking opinion to see if this is right to be pushed to production
FUNCTION QUARTER (@IN_DT DATETIME)
RETURNS VARCHAR
AS
BEGIN
	DECLARE @VDATE DATETIME
	DECLARE @SQL VARCHAR(200)
	SELECT @VDATE = @IN_DT
	SELECT @SQL = 
             DATENAME(QUARTER,CONVERT(DATETIME, @VDATE))
	RETURN @SQL
END	

Neil