Who published The Odyssey and what was the date of publication?

The Odyssey was not "published" in the way we understand the word today. It was an oral poem composed in ancient Greece, likely sometime between the 8th and 6th centuries BC.

While the exact date and author are unknown, it is generally attributed to Homer, a legendary figure whose existence is debated.

The Odyssey was first written down much later, likely in the 6th or 5th century BC.