A calavera, in the context of Day of the Dead, is a representation of a human skull or skeleton. The term is often applied to edible or decorative skulls made from either sugar or clay, used in the Mexican celebration of the Day of the Dead and the Roman Catholic holiday All Souls' Day. Calavera can also refer to any artistic representations of skulls or skeletons, such as those in the prints of José Guadalupe Posada, or to gifts or treats in relation to the Day of the Dead. Some widely known calaveras are created with cane sugar, decorated with items such as colored foil, icing, beads, and sometimes objects such as feathers. They range in multiple colors.

The Day of the Dead is a holiday traditionally celebrated on November 1 and 2, though other days, such as October 31 or November 6, may be included depending on the locality. It is widely observed in Mexico, where it largely developed, and is also observed in other places, especially by people of Mexican heritage. The observance falls during the Christian period of Allhallowtide. Some argue that there are Indigenous Mexican or ancient Aztec influences that account for the custom, and it has become a way to remember those forebears of Mexican culture. The Day of the Dead is largely seen as having a festive characteristic. The multi-day holiday involves family and friends gathering to pay respects and to remember friends and family members who have died. These celebrations can take a humorous tone, as celebrants remember funny events and anecdotes about the departed.