GOOF: At the end of episode 6x24 "Semper Fidelis" (in which the day continues in 6x25 "Aliyah") Tony hurts his arm in the fight against Michael Rivkin. At the end of "Aliyah," Tony still wears his arm in the sling. Since the episode aired on May 19th it is safe to assume, based on a principal that shows like to use air dates as current time, that this is the date in this episode. In episode 7x01 "Truth or Consquences," the flashback to May shows Tony and McGee fighting a Petty Officer. Tony is missing is sling and doesn't seem to be pain. Seeing as the fight in which he injured his arm was a fight to the death (Michael's) and required a sling, it seems unreasonable that it is magically healed in the twelve remaining days of the month.