False claims about Hong Kong's recent district elections were shared thousands of times on Facebook and Twitter. One prominent hoax claimed the elections were due to be staged on November 25, not November 24. Another hoax falsely claimed voters could select more than one pro-government candidates. Some social media posts even urged voters to write additional notes of support for candidates on their ballot sheets, which risked making their vote invalid. Despite the disinformation, the elections saw a record turnout and huge gains for pro-democracy candidates.