"But we do say "7/24". Look at your calendar."

pooh! My calendar is silent. We PRINT dates with the month first (usually). If someone askes me when I was born, I 'say' May the 20th...(or maybe "the 20th of May)....but 24/7 is a specific locution with an inflexible connotation! (ooohh..he's babbling again!!)