Question: When was the alternative to the Easter Bilby first mentioned?

full_context: Document 1: Rabbit (zodiac): The Rabbit (卯) is the fourth in the 12-year cycle of animals which appear in the Chinese zodiac related to the Chinese calendar. The Year of the Rabbit is associated with the Earthly Branch symbol 卯.
Document 2: The First Easter Rabbit: The First Easter Rabbit is a 1976 animated Easter television special that premiered on April 9 on NBC, later airing on CBS. Created by Rankin/Bass, it tells the story of the Easter Bunny's origin and is loosely based on "The Velveteen Rabbit", a children's book by Margery Williams. Burl Ives did the narration of this special which also featured the song "Easter Parade". After 1964's "Rudolph the Red-Nosed Reindeer", this is the second Rankin/Bass special to be narrated by Burl Ives.
Document 3: Reggie the Rabbit: Reggie the Rabbit is the mascot of the South Sydney Rabbitohs. The rabbit took lifesize form in 1968 when celebrity fan Don Lane brought back a suit from the US in time for the 1968 grand final against Manly Warringah Sea Eagles, won by the Bunnies 13–9. Perhaps the most notable of the early Reggies was the club's groundsman Reg Fridd. Standing just over four feet tall, the Rabbitohs lured the diminutive Kiwi from a touring production of Snow White and the Seven Dwarves, the same troupe that had yielded the second Reggie, Roscoe Bova, tragically killed in a car accident in the early 1970s. Most teams in the National Rugby League maintain mascots. But none do the sort of charity work as Reggie and none dare venture to opposition grounds as he does. Yet for the current Reggie, Charlie Gallico – a sub-five footer who runs a panelbeating shop on the side – it's all part of the job. For five years little Charlie has been quietly and anonymously volunteering his services to his club and community to maintain a sideline alter-ego as one of sport's most enduring symbols. During 2000 and 2001, when Souths was excluded from the NRL, Anth Courtney was Reggie Rabbit appearing at the second Town Hall rally and at games at Redfern Oval as well as being active in travelling extensively around the state to attend fundraisers as Reggie Rabbit.
Document 4: Julbocken (song): Julbocken, with the opening lines ""En jul när mor var liten"", is a Christmas song written by Alice Tegnér. The lyrics describe a time when the "Julbocken" (Yule goat or Christmas goat) was still a more popular Christmas gift-bringer in Sweden than the "Jultomten" (Christmas elves or gnomes) or Santa Claus. The lyrics describe the goat giving presents, a doll for "Mother" when she was a child, who was frightened when the goat jumped; and for her brother, a drum and a trumpet. When the goat is old, he returns to "Mother", who now has children of her own.
Document 5: Ēostre: Ēostre or Ostara (Old English: "Ēastre" ] , Northumbrian dialect "Ēostre " ] ; Old High German: "*Ôstara" (reconstructed form)) is a Germanic goddess who, by way of the Germanic month bearing her name (Northumbrian: "Ēosturmōnaþ "; West Saxon: "Ēastermōnaþ "; Old High German: "Ôstarmânoth" ), is the namesake of the festival of Easter in some languages. Ēostre is attested solely by Bede in his 8th-century work "The Reckoning of Time", where Bede states that during "Ēosturmōnaþ " (the equivalent of April), pagan Anglo-Saxons had held feasts in Ēostre's honor, but that this tradition had died out by his time, replaced by the Christian Paschal month, a celebration of the resurrection of Jesus.
Document 6: European rabbit: The European rabbit or common rabbit ("Oryctolagus cuniculus") is a species of rabbit native to southwestern Europe (Spain, Portugal and Western France) and northwest Africa (Morocco and Algeria). It has been widely introduced elsewhere, often with devastating effects on local biodiversity. However, its decline in its native range (caused by the diseases myxomatosis and rabbit calicivirus, as well as overhunting and habitat loss), has caused the decline of its highly dependent predators, the Iberian lynx and the Spanish imperial eagle. It is known as an invasive species because it has been introduced to countries on all continents with the exception of Antarctica, and caused many problems within the environment and ecosystems. Australia has the most problems with European rabbits, due to the lack of natural predators there.
Document 7: Easter bread: In many European countries, there are various traditions surrounding the use of bread during the Easter holidays. Traditionally the practice of eating Easter bread or sweetened "communion" bread traces its origin back to Byzantium and the Orthodox Christian church. The recipe for sweetened or "honey-leavened" bread may date back as far as the Homeric Greek period based on anecdotal evidence from classical texts that mention this type of special food. It is also widely known that sweetened bread desserts similar to panettone were a Roman favorite.
Document 8: Easter Bunny: The Easter Bunny (also called the Easter Rabbit or Easter Hare) is a folkloric figure and symbol of Easter, depicted as a rabbit bringing Easter eggs. Originating among German Lutherans, the "Easter Hare" originally played the role of a judge, evaluating whether children were good or disobedient in behaviour at the start of the season of Eastertide. The Easter Bunny is sometimes depicted with clothes. In legend, the creature carries colored eggs in his basket, candy, and sometimes also toys to the homes of children, and as such shows similarities to Santa Claus or the Christkind, as they both bring gifts to children on the night before their respective holidays. The custom was first mentioned in Georg Franck von Franckenau's "De ovis paschalibus" ('About Easter Eggs') in 1682, referring to a German tradition of an Easter Hare bringing Easter eggs for the children.
Document 9: Br'er Rabbit: Br'er Rabbit (Brother Rabbit), also spelled Bre'r Rabbit or Brer Rabbit or Bruh Rabbit, is a central figure as Uncle Remus tells stories of the Southern United States. Br'er Rabbit is a trickster who succeeds by his wits rather than by brawn, provoking authority figures and bending social mores as he sees fit. The Walt Disney Company later adapted this character for its 1946 animated motion picture "Song of the South".
Document 10: Hot Cross Bunny: Hot Cross Bunny is a 1948 Warner Bros. Merrie Melodies theatrical animated short, starring Bugs Bunny. The title is a play on the nursery rhyme "Hot Cross Buns" as well as a punny allusion to the basic plot premise.
Document 11: Easter Bilby: The Easter Bilby is an Australian alternative to the Easter Bunny.
Document 12: Domestic rabbit: A domestic rabbit or domesticated rabbit ("Oryctolagus"), more commonly known as simply a rabbit, is any of the domesticated varieties of the European rabbit species. Rabbits were first domesticated in the Middle Ages and are used as sources of food, fur, and wool, as research subjects, and as pets. The male is called a "buck" and the female is a "doe"; a young rabbit is a "kit" or "bunny".
Document 13: Bugs Bunny's Easter Special: Bugs Bunny's Easter Special (also known as "The Bugs Bunny Easter Special" and "Bugs Bunny's Easter Funnies") is a "Looney Tunes" television special featuring a number of Warner Bros. cartoons. It originally debuted on the CBS network on April 7, 1977.
Document 14: Rabbit: Rabbits are small mammals in the family Leporidae of the order Lagomorpha, found in several parts of the world. There are eight different genera in the family classified as rabbits, including the European rabbit ("Oryctolagus cuniculus"), cottontail rabbits (genus "Sylvilagus"; 13 species), and the Amami rabbit ("Pentalagus furnessi", an endangered species on Amami Ōshima, Japan). There are many other species of rabbit, and these, along with pikas and hares, make up the order Lagomorpha. The male is called a "buck" and the female is a "doe"; a young rabbit is a "kitten" or "kit".
Document 15: Enderby Island rabbit: The Enderby Island Rabbit, or simply Enderby rabbit or Enderby, is a rare breed of domesticated European rabbit ("Oryctolagus cuniculus"). It originates from rabbits introduced to Enderby Island, an uninhabited subantarctic island in New Zealand’s Auckland Islands group, from Australia in October 1865 to serve as castaway food. Over 130 years the isolated population became a distinctive variety. The rabbits were eventually exterminated for wildlife management reasons from Enderby Island in the early 1990s, but a breeding group of 49 rabbits was rescued by the Rare Breeds Conservation Society of New Zealand in September 1992. As a breed the Enderby Island rabbit is not only rare but also endangered due to the large number of hybrids formed with individuals crossing the Enderby with other domestic rabbit breeds.
ground_truth: 1682