Tifari

The Tifari is a holiday celebrated by the Demons and held every year on November 10. The Tifari is the event where the demons offer their best human livestock from the Premium Farms, to Him as tribute. This is a ceremony where demons grant their deity the most delicious harvest. The ceremony is held in front of the aristocratic demons and is a moment of great importance for society.

During this holiday, three of the best children from the Premium Farms will be shipped out, and prepared to be eaten by Him. They want to give Him only the very greatest quality human meat, and so the top-scoring children will be withheld from being shipped out, until they are at the prime condition (IQ, Age, etc.) to be offered at the Tifari.

The Tifari is treated as a big event amongst demon civilians. The Demon Villages and the Royal Capital hold many fun festivities to celebrate.

History
1000 years ago, made a deal with Julius Ratri that became known as the Promise; the demons and humans would be partitioned between two worlds, unable to access one another. The Human World would be free of demon predation, and in exchange the demons would be allowed to farm the humans stranded on their world. The Ratri Clan additionally were tasked with maintaining the promise, with Julius Ratri forced to stay in the Demon World. For the Demon's, declared the Tifari, a celebration in which the very best of all the children from the Premium Farms will be offered to Him.

Trivia

 * The Tifari is only mentioned in the anime.
 * The human "offerings" at the Tifari are most likely always humans aged twelve or older from Grace Field since the "offerings" are supposed to be the highest quality and Grace Field produces the highest quality humans of all of the Premium Farms and ages twelve or older is what is considered "premium-quality" meat at Grace Field.