'Third Day' in the Bible

Then Jonathan said to David, “The Lord, the God of Israel, be witness! When I have sounded out my father about this time tomorrow, or the third day, behold, if there is good feeling toward David, shall I not then send to you and make it known to you?

Then it happened when David and his men came to Ziklag on the third day, that the Amalekites had made a raid on the Negev and on Ziklag, and had overthrown Ziklag and burned it with fire;