N.B.
I went through this too. I called the Judges chamber and asked. (call today!) I was told that since the order stated I had my son on that holiday, which cancels out weekend visitation, I got him for the day it was celebrated.
Might be different in your state/county...but I suggest you call the Judges Chamber and ask. That way it's on record that you called in case you are told yes and your ex says no. You can call them back on Tuesday and let them know how the weekend went.
Good luck,
Nanc