day of reckoning

[day of reckoning] {n. phr.} 1. A time when one will be made to account for misdeeds.

When the criminal was caught and brought to trial his victims said, "finally, the day of reckoning has come."

2. A time when one's will and Judgment are severely tested.

"You always wanted to run the department," the dean said to Professor Smith. "Now here is your chance; this is your day of reckoning."