You shouldn't have to call him OP. He's not your father, he didn't raise you for any part of your adolescent life. You're good.

If you don't have a father-child relationship with your stepfather it makes no sense to expect you to do things you would for your father. Just because your mother married him doesn't make him a father to you just like popping a kid down doesn't make you a mom or dad. My mom married a man that she was with for years while I was growing up but I never felt he was a father figure to me. My stepmother, however, was and so I treat her as another mom and will get her things for Mother's Day and such. You can't marry in, not develop a relationship, and expect them to see you as a parental figure. You have to be the part.

So he already has kids that can spend Father's day with him, so he isn't really left out. With your explanation it honestly sounds like what someone else mentioned, that it was more your mom pushing you to call, maybe trying to get you to acknowledged him/their marriage or maybe even being vindictive attempting to steal time from your actual father, her husband probably didn't care.

That sounds like the kind of relationship that would receive a "Happy Father's Day" in passing if you happened to see him or talked to your mom that day, not the kind of relationship that requires you to go out of your way to wish it. I grew up where you told anyone you knew was a father "Happy Father's Day" if you spoke to them that day. Like if I ran into a friend's dad in town, I'd wish him a casual "Happy Father's Day" to acknowledge that he's a father. That kind of thing. Frankly, I wasn't even aware that yesterday was Father's Day until I called my mom to wish her a happy birthday. When you don't have a significant father figure in your life, that kind of thing just passes you on by, I suppose! I felt really dumb for forgetting regardless.

Your mother probably feels that since he is important to her he should be important to you. You are justified in not calling or feeling bad for not having called. Don't dwell on it - she will come to her senses.

Are you serious? Who do you think called??

Ghost busters?

No, YOU call Ghostbusters... They don't call you.

the check must have bounced or something

No, only if she had a relationship where she viewed the husband as a father figure. Which she didn't. Why the hell are you saying give him benefits he didn't earn? He didn't act the father part. It's Father's Day not "whoever my mom happens to be with" day

I think it really depends on the situation. If you've been left behind at a very young age and someone has been raising you for the rest of your life since you were for example 2 or something, I think it's quite appropriate for step parents to expect it.