Because on the SAME calendar, I see this.
"feast" day on the 15th of October. No "M". No country at all. Just there. For everyone.
And looking a month ahead, just to see if another Catholic feast is considered "M" too...
I won't go all conspiracy, right-wing nut or anything but have to say, "At-A-Glance Calendar makers, USA Catholics honor their feast days. Ok, just to be politically correct and in line with the narrative: USA Catholics honor their feast days...too."
Aye, Dios mio.
It's also on my At-A-Glance Day Planner!