'Third Day' in the Bible

“Return and say to Hezekiah the leader of My people, ‘Thus says the Lord, the God of your father David, “I have heard your prayer, I have seen your tears; behold, I will heal you. On the third day you shall go up to the house of the Lord.

Now Hezekiah said to Isaiah, “What will be the sign that the Lord will heal me, and that I shall go up to the house of the Lord the third day?”