Swiss Cheese Brain Syndrome

I wrote down an important date, so important that I put it on a sticky note and stuck it to my computer monitor. I looked at that thing every day for at least a month. The problem is, the date came, but I couldn’t remember why it was important. I wonder what I was supposed to do on that date. Still don’t know, and it was a couple of months ago. I finally threw the note away. Can anybody relate to that?