This morning I had a dentist appointment and per usual, I was running my standard fifteen minutes late. When I got there, no receptionist was at the desk but after a few minutes, a dental assistant appeared and I gave her my name. At first she seemed confused as to who I was and when I realized it was taking her a little longer than it should for her to locate me on the schedule, I joked, "don't tell me I showed up on the wrong day!" She said no, that I was just making her nervous (maybe I was giving her a look of "why aren't you finding me?") and she asked for my last name. My last name can be a little tricky so I spelled it out for her, she nodded and said okay, wait for Tammy (my hygienist) to come back (the dental group occupies 2 office spaces on the same floor).
So I waited for another 5 minutes and during that wait, the regular receptionist returned. She knows who I am, and when she saw me SHE was confused as to my presence.
Yeah, I had shown up a week early.
"Great, now I have to explain this one to my boss, " amusing her and the other gentleman waiting, "that I'm going to have to go back again next week."
When I got back to the office, I explained the (my) mix-up to my manager and then point him to my calendar where I had marked the 13th instead of the 20th, only for that to be the exact moment to learn I had in fact marked the 20th, the correct day.
You should know this leaves a remarkably swell impression of you on your manager as to your level competency.
My only guess as to why I did this (other than the obvious "because you are dim") is that for the first time in the history of my oral hygiene, when asked the condescending and annoying, "So, have you been flossing regularly?" I would have been able to look them square in the eye and tell them, "Yes, twice a day, everyday,...even the ones in back, beeyatch" and it not be a total lie.