Convert EPUB to PUB

It seems that many users are looking for a way to either convert EPUB ebooks to MS Publisher format, or import .epub file to that software, which unfortunately doesn't seem to be doable directly. Perhaps the best option would be to export the EPUB publication to PDF or Word and import that to Publisher in order to achieve epub to pub conversion this way.

Simply put, it is impossible to convert EPUB to PUB directly.
Thus, there is no so-called epub to pub converter or a free online .epub to .pub converter to be found.