A time traveler's anecdote

5:00 PM, the dining hall

Me: "You know what? I just remembered..."

Suddenly, in the past...

9:30 AM, my room

Roommate: "Just so you know, Sarah is coming by later today. She's going to invite us to the group dinner."

Me: "Okay."

Meanwhile, in the future

5:00 PM, the dining hall

Me: "We forgot about Sarah. She was going to come over."

Roommate: "What about Sarah?"

Me: "Remember? You're the one who told me!"

Roommate: "I did?"

Me: "Yeah, we were going to eat dinner, but we forgot about it. And now, here we are, eating dinner."

Roommate: "Dude, it's lunch."

Time skips backwards

11:30 AM, the dining hall

Me: "Oh."

Me: "I have a poor sense of time."

Loosely based on a true story