day of reckoning

/D EY1 AH1 V R EH1 K AH0 N IH0 NG/
noun
  1. 1

    The final and eternal judgment by God of all nations; Final Judgment.

  2. 2

    (by extension) Any time or event at which responsibility will be assigned.

Source: https://en.wiktionary.org/wiki/day%20of%20reckoning