Most Helpful Guy
If you split on good terms, yea it's fine to wish a happy father's day.
Personally I've never had a bad breakup and always remained friends. A cordial breakup is a heck of a lot better than the breakups where they end up hating each others' guts.
Just curious. Reading a little between the lines, was this a clean break? Or is there a part of you that would like to get back with him?
Most Helpful Girl
def. wish him happy fathers day it will be sweet and let him know you think he's doing a great job as a dad.