I want to know the answer to the following question:
Which holiday was the terrorist bombing planned for?
All the background I'm provided with is that "Following Garreth Mallory's promotion to M, on a mission in Mexico City unofficially ordered by a posthumous message from the previous M, 007 James Bond kills three men plotting a terrorist bombing during the Day of the Dead and gives chase to Marco Sciarra, an assassin who survived the attack.". Is that enough to answer the question?