That's just it. It is closed right now. Friday is tentatively opening. This is completely a valid reason to get refunded.
It is closed right now for business reasons - with the late start they are maintaining the slopes for the weekend, they don't get enough customers to justify being open midweek this time of year, and (I think) they don't do mid-week night operations until the holidays.
Where do you see they are tentatively opening? The website and their FB says they are opening 9am December 16.