THIS april fool's day

I am away from home so I didn't expect to have too much to worry about on April Fool's Day. However, some time in the late evening I called my dad, the mastermind of all the pranking, and this is how the conversation went...

Me: So, did I get any mail today?
Dad: Hmm, let's see. There's something here from college. It's addressed to you. I'll open it up here. Oh, it's a bill!
Me: Whatt?
Dad: Yeah, it says that they reviewed your account and you still owe $400 on your tuition!
Me: NO WAY! That is impossible! (I continue on this rant for awhile before...) Wait, this is an April Fool's joke, isn't it?
Dad: (pauses for a second) Today's April Fool's Day?
(We go back and forth for a while and he convinces me that he has been working all day and totally forgot about the date)
Me: I cannot believe that you of all people forgot April Fool's Day! (I go off on a tangent about how deprived my youngest sister is because she doesn't have the same childhood memories like the rest of us)
Dad: Well, she's right here, let me ask her about her day. Hmm, she says that her shoes were filled with newspaper. Oh, and her backpack was taped shut. I think there was something strange about the posters on her wall.
Me: Okay, so you did remember?
Dad: I didn't say that.
Me: If you remembered what today is, then you are joking about the tuition bill.
Dad: Why would I lie about that? I will send it to you in the mail.
(We end the conversation and about two seconds later I receive a text)
Dad (texting): No bill. April Fool's!