Not sure who told you that, but day 8 was 1 update then primarily a sleeping day, and day 9 is still at the early to mid day. We all thought the update prior to this one was day 8, but it was actually the start of day 9. BD hid that fact until he let us know the MC and Cedar slept through the whole day. We usually are not sure when the days will end as some of the days are 2 parts and others are 7 parts. BD has said in the past that he will do updates that go over full days or several days, but we have not seen those yet. I give you credit for being able to hold off until a full day is released there is no way I could do that with how invested I am in this story. However if you do plan to hold off for full days in the future I would confirm the day count with one of the regulars that are also patreon members of BD here like myself,
The Krypt Angel or
Englen for example. We usually do a good job of providing facts about the game and won't steer you or others wrong with misleading information.