Vaimoni likes to pretend I am one year older than I actually am. After five consecutive years of her telling me I'm a year older than I actually am, I have to think of my age, subtract one, and then check against the year and my birth year.

I put usually for everything else, because I'm spot on most of the time, but at the rollovers I might make a mistake, and when on vacation I purposefully forget what day it is.