It looks like it's a daily quest thing. According to the people who, from the sound of things, have hacked the game, once the calendar is completed around Sunday you will be presented with a multiple choice question whose answer can be found in Sunday's Treehouse of Horror episode. It makes sense they would hold off on giving you the final part and posing the question until the day the episode airs. So be patient, it's coming.
They probably release the pieces at the same time for everyone (to be retrieved upon next login, or next time a cemetery finishes its 10 hours maybe). Using donuts probably won't help you.
Unless somebody can claim otherwise? Nobody I have seen has the 4th piece yet.
It's not daily I got all mine from getting rid of the zombies, I got two a day though!
I've got all pieces and the Mayan homer, add me and have a look for your selves
When you get all of the pieces, answer the multiple choice question with " the Zune", if you answer incorrectly you will not get 10 doughnuts, but you will be given the chance to answer again to win the outfit for homer, because there are quests needed for him
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Unless somebody can claim otherwise? Nobody I have seen has the 4th piece yet.
I've got all pieces and the Mayan homer, add me and have a look for your selves
When you get all of the pieces, answer the multiple choice question with " the Zune", if you answer incorrectly you will not get 10 doughnuts, but you will be given the chance to answer again to win the outfit for homer, because there are quests needed for him
https://help.ea.com/article/have-you-been-having-issues-with-the-mayan-calendar-quest-in-tsto