Scott, who informed you of this? I ask because it goes against what I know. Granted, I'm not an "old salt" of diving, so tell me if you disagree, but in my understanding night dives and evening dives can be two different things.
At least in my mind, a "night dive" is a dive where you specifically plan for most or all of the dive to take place after dark. In other words, the goal of the dive is to be underwater in the dark, and to see "night creatures" going about their business.
On the other hand, an "evening dive," could either
also be a night dive, could partially be a night dive, or could not be a night dive at all. I would think that an "evening dive" would often be one that you would make, say, after work, and that you might often be out of the water during daylight hours and/or at or before dusk.
In other words, I see a "night dive" as having a goal to see the underwater world when it is
dark. I see an evening dive as taking place after work (or other daytime commitment), and quite possibly ending before dark (obviously, it depends).
If we are talking about the dive the group involved in the incident took the day before it happened, then I think it was referred to as an "evening dive," so we have no way of knowing if they were in and out before dark or not. It may or may not also have been a "night dive."
I don't think anyone is trying to say that night dives have been renamed.
As for the Monterey Express, their website says that they do night dives:
Night dives, special event dives and their pricing will be posted separately on the reservation calendar when scheduled.
From:
https://app.timetrade.com/tc/login.do?url=montereyexpress