I ate meat on good friday
Why are you telling me this, are you not permitted to eat meat during Good Friday?
Because I am an atheist and the day of good friday doesn't mean anything to me
Since you're not Catholic, it's perfectly reasonable for you to choose your own dietary needs. If you want to eat meat and have the means, you should enjoy it.
Are you trying to change my beliefs ?
I am not trying to change what you believe, and I am actually agreeing with you. As long as you are not harming anyone, you are free to eat what you want as long as you maintain a healthy balance of nutrients and not eating something in excess. I hope you live a healthy long life!