We go to an exercise class at 10:30 am every Tuesday.
Me at 8:00 am: Do u want to go exercise today?
Him at 8:00 am: Yes.
Me at 9:00 am: I am going to class at 10:30. You are going, right?
Me at 9:30 am: I am going to take a shower before class.
Me at 10:00 am: I am leaving in 15 minutes.
Him at 10:00 am: Why didn’t u tell me earlier? I don’t have time to get ready.
Me: I did tell you.
Him: When did you tell me?
Me: Reiterated previous announcements.
Him: Next time, tell me earlier.