Calling something a 'trial date' seems kind of redundant. The main point of a date is getting to know the person you see having potential to spend a long-term relationship with, i.e. marriage. The only way I see this being a 'trial date' is if the people involved are looking to practice getting to know someone for that same thing, and if you practice it to the point of it being a process or routine, sure, you're trying to sell the best version of yourself to that person, but it won't be as sincere as it was when you first did it.
Here, though, it's like MC's 'practicing' getting to know FMC even though he's known her a good bit already, and she's only just now putting her foot forward to try dating him for real. So it won't even be a 'trial date' anymore, just a regular date.