As I said, none of that matters. The shiplist couldn't care less what the actual date is. It does not release ships based on date, but on a certain number of years passing from the start date of the campaign. So if a ship is scheduled to appear one year after the start of the campaign, it always will, no matter what date you set. You can only change this in the Year First Available collumn in the shiplist. If the ship was scheduled to appear before year zero (2263 by default), it should always show up in the yard at the begining of a campaign. If you want certain ships to show up later then you need to add 33 to the number in the Year First Available collumn for each and evey ship in the shiplist file and the fighterlist (except the really early ships) file to do what you want.