'On that Day' in the Bible

and the priest will offer one for a sin offering and one for a burnt offering, and he will make atonement for him because he sinned concerning the corpse. He will consecrate his head on that day.

And it happened, men who were unclean {by a dead person} were not able to perform the Passover on that day. And they came {before} Moses and Aaron on that day.

So {Yahweh's anger burned} on that day, and he swore an oath, saying,