'Judgment day' in the Bible

the character of each one's work will come to light, for the judgment day will show it up. This is so, because that day will show itself in fire, and the fire will test the character of each one's work.

Keep on living upright lives among the heathen, so that, when they slander you as evildoers, by what they see of your good deeds they may come to praise God on the judgment day.