Why? If you only care about the fact that they spun the lift, then that should be it.Even for first, there should be a minimum. Like 2 days open.
First to open at all, and first to open for the season, are milestones.
Everything else is much more arbitrary and pointless, just trying to draw lines in the grey area. You could wind up with first to open for a full day, first to open for a half day, first to open for a week, etc. etc. etc.