Helmiäislisiä

I’m not able to locate a standard, widely recognized concept or term “helmiäislisiä” in Finnish sources. It may be a misspelling, a coinage, or a fictional term. Could you confirm the spelling or provide context (field, region, or definition)? If you’d like, I can create a neutral, wiki-style entry for a fictional concept named “Helmiäislisiä,” clearly labeled as fictional. Which would you prefer?