The 6th of November is Nachos Day.
Nachos were invented in Mexico, just across the border with Texas in a Mexican town called Piedras Negras. They are actually named after the cook who invented them.
For the full story, see the entry on nachos.
Pro tip: Nachos is not pronounced with the “a” as in “apple”, but rather like “gnaw – chose.”
The first print mention that CooksInfo is aware of for a Nachos Day in November dates from 2001 in California:
“6 [November]: National Election Day, Saxophone Day, National Nachos Day, Marooned Without a Compass Day.” — Morse, Debby. November is National Month Month. San Francisco, California: The San Francisco Examiner. Thursday, 1 November 2001. Page C1, col 2.