Concept of Time

So today I've grasped how terrible my concept of time is.

I left the school at around 11:00 to head to Staples, and pick up a pencil sharpener, paper, and a mouse pad among other things. By the time I got home on the bus, I figured it was at the earliest 2:00. I was guessing closer to 3.

I walked in the door, and the microwave informed me that it was only 12:47.

I love when I over-estimate the time, because it's like getting a few free hours added to my day.