My opinion is, ANY time you can be with your kid, take it. Who cares if it's Mom's day, Dad's day or fricken President's day. If your wife notices you'll always get the kid(s) when SHE wants you to....guess who else will eventually notice? Your kid. And they will know they can depend on you NO MATTER WHAT and that is worth anything.
M: 43, H: 44 Married 18 yrs, Together 26 yrs S17, D15, D8, S6 Still living in MH