> So, you actually do not need the week number,
> but just to group by weeks sequentially, do you ???
>

Ivan, I need also week number, because I must show week number to end
users.
My application is manufacturing planing, so I want build week plan with
total amount of "normo-hodiny". So planner can look at next weeks and
consider if there is free manufacturing capacity or not.
So planner must know week number, to report him for sales department.
(say on week 50 we have free capacity and we can take order on this
term ...)
Oh my english :-(

-Laco.