https://en.wikipedia.org/wiki/Day_of_reckoning#:~:text=Day_o...

Day of reckoning refers to the Last Judgment of God in Christian and Islamic belief during which everyone after death is called to account for their actions committed in life.


https://www.ldoceonline.com/dictionary/reckoning

reckoning
From Longman Dictionary of Contemporary English
reck‧on‧ing /ˈrekənɪŋ/ noun

1 [uncountable] calculation that is based on a careful guess rather than on exact knowledge
by somebody’s reckoning
By my reckoning, we have 12,000 clients.

2 countable usually singular, uncountable] a time when you are judged or punished for your actions, or when they have results that affect you
We know that you will not forget their crimes when their day of reckoning comes.
In the final reckoning, the president failed to achieve his major goals.

3 → in/into/out of the reckoning
[British English] among or not among those who are likely to win or be successful, especially in sport.


day of reckoning
• Officials concerned with environmental policy predict that a day of reckoning will come when the issue has to be faced again.
• The idea of training hard for the jump was soon shelved and the day of reckoning drew nearer.
• The smoke and sound told her the day of reckoning had begun.
• If they do that they will merely be putting off the day of reckoning.
• But on the day of reckoning a divided Kurdistan could be a fatally weakened one.
• When the day of reckoning finally arrived, the truth was found to lie well in the middle ground between these extremes.
• The day of reckoning has come.
• Their day of reckoning had come.

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Note added at 1 hr (2020-06-12 17:50:01 GMT)
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Variantes possibles en français, dans le même esprit :

l'heure de vérité / la minute de vérité
l'heure du bilan
le jour du jugement
le jour du règlement de comptes
le jour de la rétribution
le jour d'expiation
le jour fatidique