'On that Day' in the Bible

an ox, a ram for a peace offering to sacrifice in the LORD's presence, and a grain offering with olive oil, because on that day the LORD will appear to you."

because on that day, atonement will be made for you to cleanse you from all your sins. You are to be clean in the LORD's presence.

Your sacrifice is to be eaten on that day and the next day. Anything that remains to the third day is to be incinerated.

then the priest is to account to him the evaluated worth until the year of jubilee. Then he is to give the amount of valuation on that day as a holy gift to the LORD.