I'm fairly certain the OP is talking about THIS thursday, not last so your post gives him little info.
It is up to the production if they will past date at all. When the rest of the family goes, have them inquire at the box office. Since it doesn't seem to be selling too well, you have a better chance of them honoring it. Traditional past dating can only be done the day of, but it can't hurt to ask!
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.