Great roast...one of the best!!! However, do we know for certain this aired on Tuesday, November 11th, 1975? Is there a way to know any of the DMCR air dates for certain? TV.com shows Monday, November 10th, 1975. I think that's a lot less likely because of the ratings competition with Monday Night Football. Wikipedia had Saturday, October 11th...but I didn't see any authority quoted for that date.
Tuesday, November 11th, 1975 makes more sense because Police Story didn't have an episode on that date, but I just cannot prove your information is authoritative.
Incidentally, bit of trivia. This was not the day Veteran's Day was officially celebrated. In the years 1971 to 1977, it was celebrated on the last Monday of October...only period in history when it was celebrated more than one day either side of November 11th.