DS (my only child) is 17 days old. I am off work until 1 Sep next year, and I will return three days a week. We have found a nursery which we love and I am keen to get him registered asap. How long before I go back to work should he start, to get used to it before i start work again? I was thinking maybe 4 weeks before hand, starting with a couple of half days and building up to three whole days (which is what he will do when I go back to work)? Thanks.