Saturnalia is a Maiorist holiday in honour of the god Saturn, held on 17 December of the Julian Calendar and later expanded with festivities through to 23 December. The holiday is celebrated with a sacrifice at the Temple of Saturn, in the Julian Forum, and a public banquet, followed by private gift-giving, continual partying, and a carnival atmosphere that overturns rigid Eurasian social norms: gambling is permitted, and masters provide an extra table for their servants. A common custom is the election of a "King of the Saturnalia", who gives orders to people and presides over the merrymaking. The gifts exchanged are usually gag gifts or small figurines made of wax or pottery known as sigillaria. The poet Catullus called it "the best of days".
Saturnalia is the Maiorist equivalent to the Deosian holiday of Sulselaaskiin, or New Life Festival, which is celebrated during the Deosian month of Evening Star in early winter. It holds significant theological importance for many Eurasians, who see it as a restoration of the ancient Golden Age, when the world was ruled by Saturn. The philosopher Porphyry interpreted the freedom associated with Saturnalia as symbolizing the "freeing of souls into immortality". Saturnalia may have influenced some of the customs associated with later celebrations in Christian Esamir occurring in midwinter, particularly traditions associated with Christmas, the Feast of the Holy Innocents, and Epiphany.