Which is only a part of it. If they go nightly for 6 weeks, they have to consider total hours worked. Seven hours a night (5:30 to 12:30), seven days a week is 49 hours, and there’s an argument that would require overtime. Peak nights put them over 50 hours a week. They snuck around it last year because of how Universal weeks work (the workweek for them starts and ends in the middle of the week, so going Tuesday-Monday (like last year) covers 2 time-keeping weeks. And Mardi Gras performers don’t work 8 hour shifts.
Their “swing” pull is going to explode if this happens, and most primary performers will work five nights a week.