Daniel's seventy-week, 2300-year prophecy is the simplest yet most misunderstood prophecy in the Bible. The truths presented by the book of Daniel are sharp and cutting like a double-edged sword. Therefore, the book is often opposed or purposely distorted because it exposes a false system of worship that practices deception. The message outlined in Daniel chapters eight and nine is straightforward. The time prophecy describes a 490-year and 2300-year prophecy concerning Judah, Jerusalem, and the purpose and timing of Christ's ministry in His Sanctuary. Daniel's spectacular timeline opens Christ's movements throughout the ages to our understanding. The prophecies unfold all the major spiritual and historical milestones that developed throughout human history. Our study sets the backdrop behind God's message by revisiting the ancient Hebrew calendar to see how the prophets reckoned time. God buried clues to solve the mystery of the old Jewish calendar in the parched sands of Elephantine Island near the first cataract of the Nile River. Late in the nineteenth century, an adventurous Egyptologist stumbled upon seventeen papyrus documents, written in Imperial Aramaic, each bearing both a Jewish and a synchronous Egyptian date. Follow along as we brush away the sands of time from these ancient Egyptian artifacts to rediscover Daniel's Bible calendar.