Wouldn't NY Times November 11, 1918 be more appropriate today?[1] Or maybe Philip Larkin's MCMXIV.[2]
[1] http://www.history.com/this-day-in-history/world-war-i-ends
[2] http://net.lib.byu.edu/english/WWI/influence/MCMXIV.html
Veterans Day has only been held on 11/11 every year from 1954-1971 and 1978 to today. This is older.
Second, obviously a newspaper from 11/11/11 is earlier than a holiday on 11/11 precisely because the 11/11 dating comes from the end of World War I on November 11th, 1918 (on "the 11th hour of the 11th day of the 11th month"). I'm sorry if my point wasn't clear, but my original comment refers to World War I, 1918 and a poem about the start of World War I.
My original point remains: Today is (in many countries, not only the US) a national holiday in remembrance of the veterans of World War I or veterans more generally. I find it depressing that people care more about a piece of numerical trivia than that.
You don’t know that. Unless you want everyone to care about nothing else whatsoever. Don’t always assume zero sum games.