what i am trying to do is change data in a column that has four or three characters to date e.g 199 to 1/99 or 0400 to 4/00
I got syntax error converting datetime from character string.
i must be doing something wrong

declare
@date1 datetime,
@date2 varchar(12)
select @date1= Effect_Code_Change from citynews
set @date1 = '15/00'
select @date2 = convert(varchar(12),@date1,101)
select substring(@date2,4,5)