Does going to a concert make me a bad parent?

Even before my son was born I never went out anyway. When he was born his father wasn't around. Though right now his fathers parents are informing me that they are thinking about suing for grandparents rights, when my son is almost one and they've never been involved. I bought tickets for a concert around my birthday. I'm 19 and have never been to a concert before. I've also never been out once since my son has been born. This is the truth. I do not go out with friends nor do I go out period without my son. If I went to this concert, my son would be 10 months old. If my parents watched him while I left would this look bad on me in court. Like I said before this would be my first time going out just by myself.