The #EndFathersDay hashtag emerged in 2014 as a coordinated hoax orchestrated by users on the 4chan imageboard /pol/. Designed to masquerade as a radical feminist movement, the campaign used fake Twitter accounts to post inflammatory content calling for the abolition of Father's Day. The goal was to provoke outrage and manufacture a culture war moment, which succeeded as the hashtag trended and was picked up by various news outlets. Today, it serves as a classic example of internet trolling and the power of digital disinformation, often used in memes to mock manufactured outrage or to satirize historical internet hoaxes.