Dropping a night

Question about dropping a night and what would happen to our FP…Right now our trip is booked from a Tuesday-Monday. First park day is Thursday. FP day is in a few weeks, and I will make them 60 days prior to the Tuesday check in. Based on flight/work schedules that we are still working on, there’s a chance we may need to drop Tuesday night from the reservation and arrive on Wednesday instead. Either way we will not be at a park until Thursday. Will my FP still be safe if I end dropping Tuesday after I’ve already made the FP? Also, just to add, we plan to do the special 4-Park Magic ticket and will purchase those prior to FP day. Thanks!