12-hour format opens is interesting, as you folks point out, as there are actual battles that ran for a day or couple of days, so the timing of it is more realistic in that regard.
Channel Dash, Coral Sea, Midway, Battle of the Bismarck Sea, some of the battles in the Guadalcanal Campaign, Operation Torch landings, Operation Husky landings, D-Day, Alder Tag, and a bunch of others that I don't know off the top of my head.