To what extent can we attain certainty in Islamic epistemology? Among various theological subjects, the end of the world has convinced premodern Muslim theologians of its certain realisation in their own times as its imminence is prophesised in the Qur'an and Hadith traditions. From early on, Muslim scholarship has engaged with apocalypticism although none of them has known when it will take place except God. Despite this premodern scholarly engagement, contemporary scholarship has paid little attention to the subject of apocalypticism. Particularly, existing research has exclusively examined the issue in medieval times, leaving early modern scholarly engagement ignored. Addressing this gap, this study will examine three early modern apocalyptic treatises written by Muḥammad al-Usṭūwānī (d. 1072/1661), Muḥammad ibn ʿAbd al-Rasūl al-Barzanjī (d. 1103/1691), and Niyāzī-i Miṣrī (d. 1105/1694). By investigating these early modern treatises, this research will argue that apocalypticism drew the serious attention from Muslim theologians across times and places, demonstrating apocalypticism as an urgent issue to be undertaken in their living realities. Further, by situating these forgotten treatises within the broader context of Islamic apocalypticism, this research aims to offer new insights into contemporary theological discourse of apocalypticism, focusing on how early modern Muslim theologians contemplated and theologised the imminence of the end of the world.