Me and my son's father will never get along, he has him for winter break this year and somehow he…

Me and my son's father will never get along, he has him for winter break this year and somehow he always tries to argue with me about getting extra days it never fails, so break is from dec 22 to jan 2nd.. I ask him what time he'll have my son home tomorrow and he says I picked him up on the 22nd I will take him back on the 3rd... uhhh no you won't all I know is if my son is not home tomorrow I'll be contacting the authorities on his ass since he wants to play.