WE THOUGHT WE WOULD MISS the festivities, which just shows how much we still have to learn about Mexico. My husband, Peter, and I arrived in San Miguel de Allende on the 2nd of November. “It’s too bad we’ll miss the Day of the Dead,” I told Peter when he made reservations. I knew a little about the Day of the Dead. I’d seen the elaborate skeleton costumes and the cemeteries filled with flowers…