Yes! You counted right

I was thinking Friday, too, and I think you're right that it makes sense to wait till nighttime when everything will be darker, plus getting closer to 3.5 days at that point...
I have a couple thermometers I could put in, but I haven't calibrated them yet, so I might try to mess around with those in the next day or so. I'm not sure where I might have a plain bulb type one to compare with, I'll have to look, apart from the ones that are mounted to the wall lol I know the two hygrometers out of the package were showing different readings side by side so