The National Day of the Republic of China, also referred to as Double Ten Day or Double Tenth Day, is a public holiday that is now held annually in the Taiwan Area of the Republic of China.

Christmas is an annual festival commemorating the birth of Jesus Christ, observed primarily on December 25 as a religious and cultural celebration by billions of people around the world.

In the episode, first aired in December 1997, the holiday is conceived by the father of George Costanza one of the show's central characters. In the episode, Frank Costanza reveals that he came up with Festivus as a response to the commercialization of Christmas. According to reports, Festivus was initially created in February 1966 by Dan O’Keefe’s father, who made up this holiday to celebrate an anniversary with his wife.

Since the airing of the first Seinfeld episode featuring Festivus, the holiday has become popular among the fans of the show.

Considered to be one of the biggest enemies of Doctor Who, the time travelling lord, the robotic Daleks made their debut on December 21, 1963 in a 7 part serial aptly called The Daleks.

Krampus is a horned, anthropomorphic figure, in Alpine folklore, who during the Christmas season scares children who have misbehaved, assisting Saint Nicholas (the first of three good December figures; the other two being Santa Claus and Ded Moroz). The pair visit children on the night of the 5th December, and Saint Nicholas rewards the well-behaved children with modest gifts such as oranges, dried fruit, walnuts and chocolate from his big black bag, whilst the badly behaved ones only receive punishment with birch rods, after he puts them into his black bag to take them away.

The first Buy Nothing Day was organized in Canada in September 1992 "as a day for society to examine the issue of overconsumption." In 1997, it was moved to the Friday after American Thanksgiving, also called "Black Friday", which is one of the ten busiest shopping days in the United States.

Thanksgiving is a federal holiday in the United States, celebrated on the fourth Thursday of November. It is sometimes called American Thanksgiving to distinguish it from the Canadian holiday of the same name.

Halloween or Hallowe'en (a contraction of "All Hallows' evening"), also known as Allhalloween, All Hallows' Eve, or All Saints' Eve, is a celebration observed in many countries on 31 October, the eve of the Western Christian feast of All Hallows' Day. It begins the observance of Allhallowtide, the time in the liturgical year dedicated to remembering the dead, including saints (hallows), martyrs, and all the faithful departed.

Retrocession Day is the name given to the annual observance and unofficial holiday and former public holiday in Taiwan to commemorate the end of Japanese rule of Taiwan and Penghu, and the claimed retrocession of Taiwan to the Republic of China on October 25, 1945.