I think it makes the least sense to put the day of the date in the middle like the United States custom (July 4, 2009)
I think it would make the most sense to put the year first, the month next, and then the day.
2009 November 5
or the way most of the world does it - 5th day of 11th month of the year 2009 (of whatever dating system we are using) Do most of the populations on earth use the same system the US is using?
Good luck with the knee surgery, Klue.