When I was still in school, I'd handwrite the date on paper several times a day. After the end of October 2006, I was so used to writing the date by beginning with "10/..," as if to write, say, "10/31/2006" (yes, I am American), that I wrote down "10/3" before I realized it was November.

Naturally, this happens fairly frequently, not to mention regularly, and normally I would just cross it out and write the date correctly. That day, however, I decided to finish what I wrote, and I ended up with "10/32/2006." I continued to keep track of the date in terms of October 2006 until about summer of this year, when I lived without computers or pen and paper for long enough that I fell out of the habit.

During the time in between, I never mentally refreshed month or year. After all, it didn't take a whole lot of effort to keep track of date this way—it wasn't like I was trying to pick up something new, like trying to type with a new keyboard layout. Instead, I was just refusing to throw away an old (and continuously aging) habit.