Pyrus is a julekalender (Christmas Calendar) TV series broadcast on the Danish television station TV2 at Christmas time in Denmark. Initially broadcast as four semi-independent seasons, the series consists of Alletiders Jul (1994), Alletiders nisse (1995), Alletiders Julemand (1997), and Alletiders Eventyr (2000), as well as a spin-off feature film, Pyrus på Pletten, which premiered on Christmas Eve 2000.

The series is about Pyrus, an elf or nisse (or tomten), a term which is cognate with elf, but in this case specifically a Christmas elf, who lives inside of a box in the National Archives of Denmark with other elves named Kandis and Gyldengrød. Gyldengrød is the elf archivist and Pyrus and Kandis are his two apprentices. The human archivist is called Birger Bertramsen and he also has a trainee, his daughter Josefine Brahe. The humans and the elves both study national history, though in different ways. The elves can conjure themselves into both fiction and history books and gather first-hand information from the people inside the books, while the humans conduct more traditional research from the historical documents in the Archives.

The series' central plot is about Pyrus and his friends' exploration of the History of Denmark, especially the history of Danish Christmas and its related concepts, and the titles are a double entendre, playing on the meaning of Alletiders as meaning both Great and Of all times. The first season, from 1994, was called Alletiders Jul, (Christmas for the Ages) followed by Alletiders nisse (elf for the Ages); Alletiders Julemand (Santa Claus for the Ages) and Alletiders Eventyr (Fairytale for the Ages), with the concepts of, respectively, Christmas in general; the elf; the figure of Santa Clause; and Fairy Tales being the central theme of each series.

• Jan Linnebjerg as Pyrus, the young apprentice to the archive elf at the National Archives in Copenhagen.
• Paul Hüttel as von Guttenborg/von Gyldengrød, the archive elf.
• Jesper Klein as Birger Bertramsen, the human archivist, who lives illegally in his office at the Archive.
• Jeanne Boel as Josefine Brahe, Bertramsen's secretary, who is also his daughter.
• Christiane Bjørg Nielsen as Kandis, Pyrus's fellow apprentice at the Archives. First appearance in Alletiders nisse.
• Søren Østergaard as Leif-Jørgen Krusø, a policeman assigned to investigate the Archives over Christmas, later Josefine's husband. First appearance in Alletiders Julemand. A reference to Inspector Crusoe.
• Karen Gardelli as Freja, a young woman with amnesia, who can't recall which book she fell out of. Only appearance in Alletiders Jul. In reality, she is the goddess and spirit of Christmas, Xenobia.
• Steen Stig Lommer as Uffe Spage Andersen, a computer expert assigned to reform the Archives over Christmas. Only appearance in Alletiders Nisse.
• Henrik H. Lund as Julle/Santa Clause. Only appearance in Alletiders Julemand.
• Niccié and Nicolé Jølst as Mille and Molly, the twin nieces of Krusø. Only appearance in Alletiders Eventyr.

On the first of December, Pyrus, a young, undisciplined and lazy elf, arrives at the elfbo (eng. elf Dwelling) in the National Archives of Denmark. He is going to be the archive elf Gyldengrød's trainee for a year, but Pyrus only cares about eating and sleeping. Gyldengrød, an old and very intelligent elf, tries to get Pyrus a little more interested in the history of Denmark, but Pyrus finds it boring. In the human world archivist Bertramsen is met by his new secretary Josefine Brahe the same day.

As soon as Gyldengrød leaves Pyrus alone with his spell book, however, Pyrus gets curious and tries to do some magic. But Pyrus makes a mess of it, conjuring an earthquake, and in the ensuing wreckage finds a girl with amnesia, who has presumably fallen out of one of the books in the archive. The next day, Gyldengrød discovers that the problem is much bigger than first assumed, because apparently Christmas has disappeared. Nobody outside of the Archives has any recollection of Christmas, only Gyldengrød, Pyrus, Bertramsen and Josefine. Through 24 episodes Gyldengrød, Pyrus and the amnesic Freja are searching for Christmas, and for Freja's identity, in the history of Denmark by using magic to interact within the history books, and Betramsen and Brahe is rediscovering and reintroducing Christmas by studying the history of Denmark.

Alletiders Jul was broadcast on TV2 in 1994 and again in 2004.^[1]

Pyrus has just got home from the elf university and is planning on relaxing during his vacation. Unfortunately, as Gyldengrød reminds him, the elf university students have to write a paper during their holiday. Pyrus's assignment for the paper is the question "Hvad er en elf?" (eng. What is an elf?). Pyrus finds out he has to work with a classmate, the sweet and very clever female elf Kandis, to complete the task. Through the 24 episodes of the series, Pyrus and Kandis travel into a variety of books of fiction, fairytales, fables, children's books and other literature to research their papers.

In the human world, the National Archives of Denmark is going to be torn down, and all the national history digitized and moved to EDP. An EDP expert, Uffe Spage Andersen, is going to digitize the entire collection. Bertramsen and Josefine try to convince the government not to tear down the Archives by proving something you can't prove by searching on the Internet: elves exist! Through the series, Bertramsen and Josephine read everything about elves, but as nobody has ever seen a elf before they can't prove their existence. But one day, without realizing it, Uffe Andersen locks Kandis inside a closet. The only way Pyrus and Gyldengrød can rescue Kandis is by contacting the humans, breaking elves law by showing themselves to the humans.

Alletiders Nisse was broadcast on TV2 in 1995 and again in 2006.^[1]

Pyrus is unsatisfied with the fact that elves do not get presents from Santa Claus at Christmas Time. He writes a letter for Santa Claus resulting in Santa Claus arriving at the National Archives of Denmark the next day. Without knowing the fact that Santa Claus is already there, Pyrus steals Gyldengrød's magic book and tries to bring Santa Claus to the Archives from a book about Santa Claus, resulting in a Santa Claus with amnesia. Christmas is in a big danger because if there's no Santa Claus, there are no Christmas presents, and if there are no Christmas presents, then there will be a very sad Christmas. Pyrus, Gyldengrød, Kandis, Bertramsen and Josefine are all together trying to rediscover the myth about Santa Claus while they teach Santa about himself in hope that he might turn in to Santa Claus again.

Alletiders Julemand was broadcast on TV2 in 1997 and again in 2007 and 2014.^[1]

Bertramsen is assigned by the Royal Family to assemble a collection of fairy tales for the newborn prince, but, by accident, Pyrus manages to magically combine all of the fairy tales into one large book of randomly jumbled snippets of stories. Meanwhile, Krusø is looking after his nieces over Christmas, and, while playing with the elves, one of the twins get lost in the book. Pyrus, Kandis, Gyldengrød, Bertramsen and Josefine now have to find the lost girl, as well as rediscover all of the fairy tales to get them back in place in time for Christmas.

Alletiders Eventyr was broadcast on TV2 in 2000.^[1]