Danielic Chronology and the Hebrew Festal Calendar: A Reverse-Anchor Analysis of Daniel 9:27 and Daniel 12:11-12

This study presents a constrained chronological investigation into the numerical intervals of Daniel 9:27 and Daniel 12:11-12 by testing whether those intervals, when treated provisionally as literal day totals and reverse-counted from selected Hebrew festal termini, generate non-random liturgical coherence within the Hebrew calendar. Six festal anchor classes are tested across Hebrew years 5791-5798, with extended sanity-check verification across 5784-5809. The principal finding is a categorical asymmetry at the month level: of the twelve Hebrew months, only Tishri produces simultaneous 100% commencement clustering in Elul or Av and 100% midpoint clustering in Adar or Shevat under reverse-counting from Daniel's intervals. Within Tishri, the simultaneous-100% clustering window spans seventeen consecutive days, encompassing the entire high-holy-day complex from Erev Yom Kippur through Shemini Atzeret. The paper does not claim discovery of Daniel's exclusive terminal year, nor does it claim to displace the Antiochene historical matrix of Daniel's composition. Rather, it argues that Daniel's numerical architecture exhibits categorical Tishri specificity, warranting further formal investigation in biblical chronology and canonical hermeneutics.