This dissertation considers how early Mormon literature (1829-1845) produced a unique theory of temporality that shaped the religion’s material developments in the nineteenth century and beyond. While it may seem unremarkable that a nineteenth-century Restorationist religion spurned the increasing secularization of time in post-revolutionary America, this dissertation shows how early Mormonism’s interventions in sacred storytelling produced a radical new theory of the Christian canonical past, present, and future and thus developed a wholly original relationship between humanity, eternity, and the present. In following Emily Apter’s theoretical proposition of “untiming” (after Nietzsche’s notion of the “untimely”), my dissertation moves beyond the excessive historicism that has long-shaped scholarly consideration of Mormon literature, and instead seeks to understand how these texts produced a new sense of time for their earliest readers. Beginning with the experimental narrative form of The Book of Mormon and tracing these radical literary instincts through Smith’s subsequent translation projects and Parley P. Pratt’s apocalyptic texts, this dissertation argues that Mormonism’s distinct temporality was produced first and foremost in its literature. To read these texts as literature is itself a scholarly intervention. Aside from The Book of Mormon, a text held sacred by most of its readers that has only very recently become of interest to literary scholars, the primary texts in this dissertation are largely unknown to the literary discipline. By drawing on various literary theoretical fields—narrative theory, translation studies, and apocalypse studies—my research shows how Mormonism’s earliest literary architects, Smith and Pratt in particular, produced an experimental textual canon that imbued their readers with a sense of the eternal in time that contrasted the systematization of time taking hold in the broader culture. In charting how these texts rearrange and reformulate the linearity of modern time, I argue that early Mormon literature prefigures and performs this new temporality through visionary narrative interruptions, a progressive theory of translation, and a distinctly materialist millenarianism. In studying Mormonism’s novel theory of time through its literature, this dissertation ultimately considers how this archive’s new conceptualization of eternity produced an urgency to gather and build Zion in the modern political world.