Time Horizons of Futuristic Fiction (THFF) is a dataset that collects 2,400 works of English-language speculative fiction set in the future, each marked with the year it was published and the year it takes place. It allows for analyses of how far a future the genre has imagined from 1733 - 2023. This poster detailing THFF was accepted and presented at the DH2024 conference in Washington, D.C. The dataset itself is forthcoming with the Post45 Data Collective.