Did Undas originate from ancient Aztec beliefs?

I’m quite sure media started to call the Filipino feast of trooping to the cemeteries to honor their departed on November 1 as Undas only in the past several years.

I never heard the term used in our family. Instead, that must-observe ritual was called Todos los Santos or even Araw ng mga Patay. I had been puzzled though why the cemetery-going day was on Todos los Santos, or All Saints Day. Logically, we should be honoring our dead on November 2, All Souls Day, officially called by the Catholic Church as “The Commemoration of All the Faithful Departed”.