Wednesday this week (6/19/13) is a Minus Subtract Day: 19 minus 6 equals 13.
Thursday (6/20/13) is this month’s Half-back Day: Move up 14 from 6, then come half way (7) back to 13. See the May 19th post for the definition and history of half-back days. Tune in next Sunday for instructions on how to calculate the day of the month that will act like a half-back.
A. Knapp for That 