Father's Day

I don't really know when is father's day. Even though I knew when it was, I will not celebrate it because I really don't like my father very much. He left us when I was young. My mother told me that he left us because of the argument between them. Since then, my father only visit us every Sunday. When I was in first year, he stopped visiting us. I lost contact with him and he didn't support us financially.
I don't treat him as my father now...
I don't celebrate father's day...