The text explores the meaning and interrelatedness of two central notions in Heidegger's Augenblick and Ereignis. The former is associated not only with the analysis of temporality in Sein und Zeit, but also to the ideal of the kairological critique, as this is articulated in the earliest writings. The text tries to show how the central notion of Ereignis in the later writings evolves as a reworking of these previous themes.