The 19th actually wasn’t bookable until 8am this morning unless I am mistakenEither a glitch in the system or walking are the only explanations. Since you can book up to 7 days past your window, the 19th is technically bookable if you book an entire week. CCV studios have had problems year-round so while I'd be surprised to see walking done in that quantity that far in advance, it wouldn't be out of line.