declare @whatday varchar(20),
	@whatweek int,
        @whatyear char(4)

set @whatday = 'monday'
set @whatweek = 44
set @whatyear = '2003'

declare
	@dayofweek int,
	@firstofyear datetime

set @firstofyear = convert(datetime,'1/1/' + @whatyear)

select @dayofweek = 
	case when @whatday = 'monday' then  2
	 when @whatday = 'tuesday' then  3
	 when @whatday = 'wednesday' then  4
	 when @whatday = 'thursday' then 5
	 when @whatday = 'friday' then  6
	 when @whatday = 'saturday' then 7
	 when @whatday = 'sunday' then  1
	end

select dateadd(dd,(datepart(weekday,(dateadd(ww,@whatweek,@firstofyear))) - @dayofweek)*-1,dateadd(ww,@whatweek,@firstofyear))