T-SQL: Function to create a datetime

DATEFROMPARTS() function is from SQL Server version 2012 and later, working on SQL Server 2008 I have to created a function to create a datetime from parts.

CREATE FUNCTION dbo.BuildDate(@Y AS int, @MO AS int, @D as int, @H as int = 0, @MI as int = 0, @S as int = 0)

RETURNS DATETIME

AS
BEGIN

    DECLARE @Data as DATETIME
    DECLARE @Y_N AS char(5), @MO_N AS char(3), @D_N as char(3), @H_N as char(3), @MI_N as char(3), @S_N as char(2)
    SET @Data=NULL

    SET @Y_N = convert(char(4),@Y)+'-'
    SET @MO_N = convert(char(2),@MO)+'-'
    SET @D_N = convert(char(2),@D)+' '
    SET @H_N = convert(char(2),@H)+':'
    SET @MI_N = convert(char(2),@MI)+':'
    SET @S_N = convert(char(2),@S)

    SET @Data = CONVERT(datetime, ''+@Y_N+@MO_N+@D_N+@H_N+@MI_N+@S_N+'')

    RETURN @Data

END

Let's use it:

SELECT dbo.BuildDate(2016,9,30,12,43, default)