@Mom2Engineers, the wait will suck, no matter what the release date is. My son was actually pretty calm about it. I was the one that sweated each moment. I vaguely remember that the release date wasn’t about a specific date in February, but more like a “3rd Wednesday of the month” kind of thing. Luckily for you, Cal Poly is one of the better schools when it comes to consistency and conformity. The notifications should come out in order (alphabetically by college) and seemed to be pretty steady rather than at a trickle like other schools not to be named.
However, it seemed that all of that was not the case with wait-list and denial notices. Going only by what people posted here, those seemed to come out much later and out of order. That could have been simply due to how people post that information. Obviously, someone who gets in will shout excitedly and post quickly, where someone wait-listed or denied might be hesitant or avoid posting results at all.
Good luck.