This volume "Celebrating in the Rhythm of Time" addresses two aspects: Time is presented to humanity as measured by cosmic bodies, and it is tasked with translating these measurements into a socially binding order. How does the tradition of liturgy organize the time of the Church and of humanity? Philipp Harnoncourt demonstrates that the way liturgy interacts with time is more complex and profound than it may initially appear. For how humans engage with time reveals their understanding of the world and God's presence within it, and the time managed according to days, weeks, and years is not merely a sequence of moments, but a space-time for human history. Throughout all epochs, since the first generation of Christians proclaimed the resurrection of Jesus Christ, the Gospel proves to be central.