'Days' in the Bible

And Jehovah appointeth a great fish to swallow up Jonah, and Jonah is in the bowels of the fish three days and three nights.

and Jonah riseth, and he goeth unto Nineveh, according to the word of Jehovah. And Nineveh hath been a great city before God, a journey of three days.

And Jonah beginneth to go in to the city a journey of one day, and proclaimeth, and saith, 'Yet forty days -- and Nineveh is overturned.'