'In that Day' in the Bible

Then My anger will be kindled and burn against them in that day, and I will abandon (turn away from) them and hide My face from them. They will be devoured, and many evils and troubles will come on them, so that they will say in that day, ‘Is it not because our God is not among us that these evils have come on us?’

But I will certainly hide My face [from them] in that day because of all the evil which they will do, for they will turn to other gods [to worship lifeless idols, to honor handmade relics].